Fix ESLint setup and errors

package.json

@@ -34,6 +34,7 @@
         "react-dom": "16.9.0",
         "react-hot-loader": "^4.12.19",
         "react-native": "0.61.5",
+        "react-native-dom": "^0.5.0",
         "react-native-windows": "^0.61.0-0"
     },
     "dependencies": {
@@ -42,7 +43,7 @@
         "shaka-player": "^2.5.9"
     },
     "scripts": {
-        "lint": "yarn eslint *.js"
+        "lint": "eslint ."
     },
     "files": [
         "android-exoplayer",