Add simulator/emulator workflow tasks

.github/workflows/detox.yml

     name: 'Running tests'
     runs-on: 'macOS-latest'
     steps:
+      - name: List Android Emulators
+        run: emulator -list-avds
+      - name: List iOS Simulators
+        run: xcrun simctl list
       - uses: actions/checkout@master
       - uses: actions/setup-node@master
         with:

examples/WebTest/package.json

         "binaryPath": "ios/build/Build/Products/Debug-iphonesimulator/WebTest.app",
         "build": "xcodebuild -workspace ios/WebTest.xcworkspace -scheme WebTest -configuration Debug -sdk iphonesimulator -derivedDataPath ios/build",
         "type": "ios.simulator",
-        "name": "iPhone X, iOS 12.4"
+        "name": "iPhone X"
       },
       "android.emu.debug": {
         "binaryPath": "android/app/build/outputs/apk/debug/app-debug.apk",