chore(bundlesize): add github workflows to check compressed size (ela…

…stic#652)

* chore(bundlesize): add github workflows to check compressed size[skip ci]

* add pattern and fetch depth [skip ci]

.github/workflows/bundle-size.yml

@@ -0,0 +1,18 @@
+name: Compressed Size
+
+on: [pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 1
+    - uses: preactjs/compressed-size-action@v1
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"
+        build-script: "npx lerna run build:module"
+        pattern: "{packages/rum/dist/bundles/*.js}"