Fixes youtube embed issues (#50)

* fixes youtube embed

* move extractMetaHtml test to its own file

* tests cleanup

* Add fallback for youtube meta data

* lint

* Check for youtube in the url domain

* use hostname instead of full url to check for link domain

* checks only for domain

package.json

@@ -9,6 +9,7 @@
     "start": "react-native start",
     "clean-cache": "rm -rf node_modules/.cache/babel-loader/*",
     "test": "jest",
+    "test-watch": "jest --watchAll",
     "test-ci": "jest --ci --forceExit --reporters=default --reporters=jest-junit",
     "test-coverage": "jest --coverage",
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx"
@@ -114,6 +115,7 @@
     "transformIgnorePatterns": [
       "node_modules/(?!(jest-)?react-native|react-clone-referenced-element|@react-native-community|rollbar-react-native|@fortawesome|@react-native|@react-navigation)"
     ],
+    "modulePathIgnorePatterns": ["__tests__\/.*\/__mocks__"],
     "coveragePathIgnorePatterns": [
       "<rootDir>/node_modules/",
       "<rootDir>/src/platform",