added bundleSize

.github/workflows/bundleSize.yml

@@ -0,0 +1,15 @@
+name: "react-native-bundle-size"
+on: [pull-request]
+
+jobs:
+  test_something:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: shwetsolanki/react-native-bundle-size@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          ios-entry-file: "index.js"
+          android-entry-file: "index.js"
+          include-assets: "true"
+          include-source-maps: "true"