diff --git a/.appveyor.yml b/.appveyor.yml
index 064bf26..2421716 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -4,7 +4,7 @@ build: off
 platform: x64
 environment:
   matrix:
-    - nodejs_version: 10
+    - nodejs_version: 12
 install:
   - ps: Install-Product node $env:nodejs_version x64
   - set CI=true
diff --git a/.travis.yml b/.travis.yml
index 2e2b807..6ba3662 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - 10
+  - 12
 before_install:
   - npm i -g npm@latest
 cache:
diff --git a/package-lock.json b/package-lock.json
index 79ba502..13deb91 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,35 +13,6 @@
         "tslib": "^1.9.0"
       }
     },
-    "@ava/babel-plugin-throws-helper": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/@ava/babel-plugin-throws-helper/-/babel-plugin-throws-helper-4.0.0.tgz",
-      "integrity": "sha512-3diBLIVBPPh3j4+hb5lo0I1D+S/O/VDJPI4Y502apBxmwEqjyXG4gTSPFUlm41sSZeZzMarT/Gzovw9kV7An0w==",
-      "dev": true
-    },
-    "@ava/babel-preset-stage-4": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/@ava/babel-preset-stage-4/-/babel-preset-stage-4-4.0.0.tgz",
-      "integrity": "sha512-lZEV1ZANzfzSYBU6WHSErsy7jLPbD1iIgAboASPMcKo7woVni5/5IKWeT0RxC8rY802MFktur3OKEw2JY1Tv2w==",
-      "dev": true,
-      "requires": {
-        "@babel/plugin-proposal-async-generator-functions": "^7.2.0",
-        "@babel/plugin-proposal-dynamic-import": "^7.5.0",
-        "@babel/plugin-proposal-optional-catch-binding": "^7.2.0",
-        "@babel/plugin-transform-dotall-regex": "^7.4.4",
-        "@babel/plugin-transform-modules-commonjs": "^7.5.0"
-      }
-    },
-    "@ava/babel-preset-transform-test-files": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/@ava/babel-preset-transform-test-files/-/babel-preset-transform-test-files-6.0.0.tgz",
-      "integrity": "sha512-8eKhFzZp7Qcq1VLfoC75ggGT8nQs9q8fIxltU47yCB7Wi7Y8Qf6oqY1Bm0z04fIec24vEgr0ENhDHEOUGVDqnA==",
-      "dev": true,
-      "requires": {
-        "@ava/babel-plugin-throws-helper": "^4.0.0",
-        "babel-plugin-espower": "^3.0.1"
-      }
-    },
     "@babel/code-frame": {
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
@@ -75,18 +46,6 @@
         "source-map": "^0.5.0"
       },
       "dependencies": {
-        "@babel/parser": {
-          "version": "7.9.6",
-          "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.9.6.tgz",
-          "integrity": "sha512-AoeIEJn8vt+d/6+PXDRPaksYhnlbMIiejioBZvvMQsOjW/JYK6k/0dKnvvP3EhK5GfMBWDPtrxRtegWdAcdq9Q==",
-          "dev": true
-        },
-        "semver": {
-          "version": "5.7.1",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
-          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
-          "dev": true
-        },
         "source-map": {
           "version": "0.5.7",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
@@ -115,26 +74,6 @@
         }
       }
     },
-    "@babel/helper-annotate-as-pure": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.8.3.tgz",
-      "integrity": "sha512-6o+mJrZBxOoEX77Ezv9zwW7WV8DdluouRKNY/IR5u/YTMuKHgugHOzYWlYvYLpLA9nPsQCAAASpCIbjI9Mv+Uw==",
-      "dev": true,
-      "requires": {
-        "@babel/types": "^7.8.3"
-      }
-    },
-    "@babel/helper-create-regexp-features-plugin": {
-      "version": "7.8.8",
-      "resolved": "https://registry.npmjs.org/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.8.8.tgz",
-      "integrity": "sha512-LYVPdwkrQEiX9+1R29Ld/wTrmQu1SSKYnuOk3g0CkcZMA1p0gsNxJFj/3gBdaJ7Cg0Fnek5z0DsMULePP7Lrqg==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-annotate-as-pure": "^7.8.3",
-        "@babel/helper-regex": "^7.8.3",
-        "regexpu-core": "^4.7.0"
-      }
-    },
     "@babel/helper-function-name": {
       "version": "7.9.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.9.5.tgz",
@@ -197,34 +136,6 @@
         "@babel/types": "^7.8.3"
       }
     },
-    "@babel/helper-plugin-utils": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.8.3.tgz",
-      "integrity": "sha512-j+fq49Xds2smCUNYmEHF9kGNkhbet6yVIBp4e6oeQpH1RUs/Ir06xUKzDjDkGcaaokPiTNs2JBWHjaE4csUkZQ==",
-      "dev": true
-    },
-    "@babel/helper-regex": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/helper-regex/-/helper-regex-7.8.3.tgz",
-      "integrity": "sha512-BWt0QtYv/cg/NecOAZMdcn/waj/5P26DR4mVLXfFtDokSR6fyuG0Pj+e2FqtSME+MqED1khnSMulkmGl8qWiUQ==",
-      "dev": true,
-      "requires": {
-        "lodash": "^4.17.13"
-      }
-    },
-    "@babel/helper-remap-async-to-generator": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.8.3.tgz",
-      "integrity": "sha512-kgwDmw4fCg7AVgS4DukQR/roGp+jP+XluJE5hsRZwxCYGg+Rv9wSGErDWhlI90FODdYfd4xG4AQRiMDjjN0GzA==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-annotate-as-pure": "^7.8.3",
-        "@babel/helper-wrap-function": "^7.8.3",
-        "@babel/template": "^7.8.3",
-        "@babel/traverse": "^7.8.3",
-        "@babel/types": "^7.8.3"
-      }
-    },
     "@babel/helper-replace-supers": {
       "version": "7.9.6",
       "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.9.6.tgz",
@@ -262,18 +173,6 @@
       "integrity": "sha512-/8arLKUFq882w4tWGj9JYzRpAlZgiWUJ+dtteNTDqrRBz9Iguck9Rn3ykuBDoUwh2TO4tSAJlrxDUOXWklJe4g==",
       "dev": true
     },
-    "@babel/helper-wrap-function": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/helper-wrap-function/-/helper-wrap-function-7.8.3.tgz",
-      "integrity": "sha512-LACJrbUET9cQDzb6kG7EeD7+7doC3JNvUgTEQOx2qaO1fKlzE/Bf05qs9w1oXQMmXlPO65lC3Tq9S6gZpTErEQ==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-function-name": "^7.8.3",
-        "@babel/template": "^7.8.3",
-        "@babel/traverse": "^7.8.3",
-        "@babel/types": "^7.8.3"
-      }
-    },
     "@babel/helpers": {
       "version": "7.9.6",
       "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.9.6.tgz",
@@ -294,145 +193,13 @@
         "@babel/helper-validator-identifier": "^7.9.0",
         "chalk": "^2.0.0",
         "js-tokens": "^4.0.0"
-      },
-      "dependencies": {
-        "ansi-styles": {
-          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
-          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
-          "dev": true,
-          "requires": {
-            "color-convert": "^1.9.0"
-          }
-        },
-        "chalk": {
-          "version": "2.4.2",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
-          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "^3.2.1",
-            "escape-string-regexp": "^1.0.5",
-            "supports-color": "^5.3.0"
-          }
-        },
-        "color-convert": {
-          "version": "1.9.3",
-          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
-          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
-          "dev": true,
-          "requires": {
-            "color-name": "1.1.3"
-          }
-        },
-        "color-name": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
-          "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
-          "dev": true
-        },
-        "has-flag": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
       }
     },
     "@babel/parser": {
-      "version": "7.9.4",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.9.4.tgz",
-      "integrity": "sha512-bC49otXX6N0/VYhgOMh4gnP26E9xnDZK3TmbNpxYzzz9BQLBosQwfyOe9/cXUU3txYhTzLCbcqd5c8y/OmCjHA==",
-      "dev": true
-    },
-    "@babel/plugin-proposal-async-generator-functions": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.8.3.tgz",
-      "integrity": "sha512-NZ9zLv848JsV3hs8ryEh7Uaz/0KsmPLqv0+PdkDJL1cJy0K4kOCFa8zc1E3mp+RHPQcpdfb/6GovEsW4VDrOMw==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.8.3",
-        "@babel/helper-remap-async-to-generator": "^7.8.3",
-        "@babel/plugin-syntax-async-generators": "^7.8.0"
-      }
-    },
-    "@babel/plugin-proposal-dynamic-import": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.8.3.tgz",
-      "integrity": "sha512-NyaBbyLFXFLT9FP+zk0kYlUlA8XtCUbehs67F0nnEg7KICgMc2mNkIeu9TYhKzyXMkrapZFwAhXLdnt4IYHy1w==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.8.3",
-        "@babel/plugin-syntax-dynamic-import": "^7.8.0"
-      }
-    },
-    "@babel/plugin-proposal-optional-catch-binding": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-optional-catch-binding/-/plugin-proposal-optional-catch-binding-7.8.3.tgz",
-      "integrity": "sha512-0gkX7J7E+AtAw9fcwlVQj8peP61qhdg/89D5swOkjYbkboA2CVckn3kiyum1DE0wskGb7KJJxBdyEBApDLLVdw==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.8.3",
-        "@babel/plugin-syntax-optional-catch-binding": "^7.8.0"
-      }
-    },
-    "@babel/plugin-syntax-async-generators": {
-      "version": "7.8.4",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-async-generators/-/plugin-syntax-async-generators-7.8.4.tgz",
-      "integrity": "sha512-tycmZxkGfZaxhMRbXlPXuVFpdWlXpir2W4AMhSJgRKzk/eDlIXOhb2LHWoLpDF7TEHylV5zNhykX6KAgHJmTNw==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.8.0"
-      }
-    },
-    "@babel/plugin-syntax-dynamic-import": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-dynamic-import/-/plugin-syntax-dynamic-import-7.8.3.tgz",
-      "integrity": "sha512-5gdGbFon+PszYzqs83S3E5mpi7/y/8M9eC90MRTZfduQOYW76ig6SOSPNe41IG5LoP3FGBn2N0RjVDSQiS94kQ==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.8.0"
-      }
-    },
-    "@babel/plugin-syntax-optional-catch-binding": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-optional-catch-binding/-/plugin-syntax-optional-catch-binding-7.8.3.tgz",
-      "integrity": "sha512-6VPD0Pc1lpTqw0aKoeRTMiB+kWhAoT24PA+ksWSBrFtl5SIRVpZlwN3NNPQjehA2E/91FV3RjLWoVTglWcSV3Q==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.8.0"
-      }
-    },
-    "@babel/plugin-transform-dotall-regex": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.8.3.tgz",
-      "integrity": "sha512-kLs1j9Nn4MQoBYdRXH6AeaXMbEJFaFu/v1nQkvib6QzTj8MZI5OQzqmD83/2jEM1z0DLilra5aWO5YpyC0ALIw==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-create-regexp-features-plugin": "^7.8.3",
-        "@babel/helper-plugin-utils": "^7.8.3"
-      }
-    },
-    "@babel/plugin-transform-modules-commonjs": {
       "version": "7.9.6",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-modules-commonjs/-/plugin-transform-modules-commonjs-7.9.6.tgz",
-      "integrity": "sha512-7H25fSlLcn+iYimmsNe3uK1at79IE6SKW9q0/QeEHTMC9MdOZ+4bA+T1VFB5fgOqBWoqlifXRzYD0JPdmIrgSQ==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-module-transforms": "^7.9.0",
-        "@babel/helper-plugin-utils": "^7.8.3",
-        "@babel/helper-simple-access": "^7.8.3",
-        "babel-plugin-dynamic-import-node": "^2.3.3"
-      }
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.9.6.tgz",
+      "integrity": "sha512-AoeIEJn8vt+d/6+PXDRPaksYhnlbMIiejioBZvvMQsOjW/JYK6k/0dKnvvP3EhK5GfMBWDPtrxRtegWdAcdq9Q==",
+      "dev": true
     },
     "@babel/runtime": {
       "version": "7.9.6",
@@ -441,6 +208,14 @@
       "dev": true,
       "requires": {
         "regenerator-runtime": "^0.13.4"
+      },
+      "dependencies": {
+        "regenerator-runtime": {
+          "version": "0.13.5",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.5.tgz",
+          "integrity": "sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA==",
+          "dev": true
+        }
       }
     },
     "@babel/template": {
@@ -469,20 +244,6 @@
         "debug": "^4.1.0",
         "globals": "^11.1.0",
         "lodash": "^4.17.13"
-      },
-      "dependencies": {
-        "@babel/parser": {
-          "version": "7.9.6",
-          "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.9.6.tgz",
-          "integrity": "sha512-AoeIEJn8vt+d/6+PXDRPaksYhnlbMIiejioBZvvMQsOjW/JYK6k/0dKnvvP3EhK5GfMBWDPtrxRtegWdAcdq9Q==",
-          "dev": true
-        },
-        "globals": {
-          "version": "11.12.0",
-          "resolved": "https://registry.npmjs.org/globals/-/globals-11.12.0.tgz",
-          "integrity": "sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==",
-          "dev": true
-        }
       }
     },
     "@babel/types": {
@@ -502,6 +263,12 @@
       "integrity": "sha512-6xnwtvp9DY1EINIKdTfvfeAtCYw4OqBZJhtiqkT3ivjnEfa25VQ3TsKvaFfKm8MyGIEfE95qLe+bNEt3nB0Ylg==",
       "dev": true
     },
+    "@blakeembrey/template": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@blakeembrey/template/-/template-1.0.0.tgz",
+      "integrity": "sha512-J6WGZqCLdRMHUkyRG6fBSIFJ0rL60/nsQNh5rQvsYZ5u0PsKw6XQcJcA3DWvd9cN3j/IQx5yB1fexhCafwwUUw==",
+      "dev": true
+    },
     "@concordance/react": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/@concordance/react/-/react-2.0.0.tgz",
@@ -509,6 +276,14 @@
       "dev": true,
       "requires": {
         "arrify": "^1.0.1"
+      },
+      "dependencies": {
+        "arrify": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+          "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
+          "dev": true
+        }
       }
     },
     "@glimmer/interfaces": {
@@ -541,16 +316,75 @@
       "integrity": "sha512-FmuxfCuolpLl0AnQ2NHSzoUKWEJDFl63qXjzdoWBVyFCXzMGm1spBzk7LeHNoVCiWCF7mRVms9e6jEV9+MoPbg==",
       "dev": true
     },
-    "@mrmlnc/readdir-enhanced": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz",
-      "integrity": "sha512-bPHp6Ji8b41szTOcaP63VlnbbO5Ny6dwAATtY6JTjh5N2OLrb5Qk/Th5cRkRQhkWCt+EJsYrNB0MiL+Gpn6e3g==",
+    "@istanbuljs/load-nyc-config": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.0.0.tgz",
+      "integrity": "sha512-ZR0rq/f/E4f4XcgnDvtMWXCUJpi8eO0rssVhmztsZqLIEFA9UUP9zmpE0VxlM+kv/E1ul2I876Fwil2ayptDVg==",
       "dev": true,
       "requires": {
-        "call-me-maybe": "^1.0.1",
-        "glob-to-regexp": "^0.3.0"
+        "camelcase": "^5.3.1",
+        "find-up": "^4.1.0",
+        "js-yaml": "^3.13.1",
+        "resolve-from": "^5.0.0"
+      },
+      "dependencies": {
+        "find-up": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+          "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
+          "dev": true,
+          "requires": {
+            "locate-path": "^5.0.0",
+            "path-exists": "^4.0.0"
+          }
+        },
+        "locate-path": {
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diff --git a/package.json b/package.json
index 93d2931..263f179 100644
--- a/package.json
+++ b/package.json
@@ -45,27 +45,27 @@
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   ],
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-    "backstopjs": "^3.8.9",
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