- Fix: Avoid errors occurring in Chrome now for supportsGoodTextCharPos

- Linting: Avoid Jamilih file in doc linting
- Testing: Add testcafe (ESLint plugin/rules, accessibility test
  (failing), ui test beginnings (passing))
- Docs: Add "Testing" prefix to contributing file
- npm: Bump to 3.0.0-rc.3

package.json

@@ -1,6 +1,6 @@
 {
   "name": "svgedit",
-  "version": "3.0.0-rc.2",
+  "version": "3.0.0-rc.3",
   "description": "Powerful SVG-Editor for your browser ",
   "main": "dist/index-umd.js",
   "module": "dist/index-es.js",
@@ -25,6 +25,7 @@
     "start": "echo \"Open file to http://localhost:8000/test/all_tests.html\" && static -p 8000",
     "test-no-build": "npm run eslint && npm run build-html && npm run build-config && opn http://localhost:8000/test/all_tests.html && static -p 8000",
     "test-prep": "npm run eslint && npm run build-html && npm run rollup && npm run build-config",
+    "ui-tests": "testcafe chrome test/ui-tests/**/*.js",
     "test": "npm run test-prep && opn http://localhost:8000/test/all_tests.html && static -p 8000"
   },
   "repository": {
@@ -56,6 +57,7 @@
     "@babel/core": "^7.1.2",
     "@babel/polyfill": "^7.0.0",
     "@babel/preset-env": "^7.1.0",
+    "axe-testcafe": "^1.1.0",
     "babel-plugin-transform-object-rest-spread": "^7.0.0-beta.3",
     "eslint": "5.6.1",
     "eslint-config-standard": "12.0.0",
@@ -64,6 +66,7 @@
     "eslint-plugin-promise": "4.0.1",
     "eslint-plugin-qunit": "^4.0.0",
     "eslint-plugin-standard": "4.0.0",
+    "eslint-plugin-testcafe": "^0.2.1",
     "find-in-files": "^0.5.0",
     "imageoptim-cli": "^2.0.3",
     "jamilih": "^0.42.0",
@@ -84,6 +87,7 @@
     "rollup-plugin-re": "^1.0.7",
     "rollup-plugin-terser": "^3.0.0",
     "sinon": "^6.3.4",
-    "sinon-test": "^2.3.0"
+    "sinon-test": "^2.3.0",
+    "testcafe": "^0.22.0"
   }
 }