ci: add size check on push (#2392)

.github/workflows/size-check.yml

@@ -1,5 +1,8 @@
 name: 'size'
 on:
+  push:
+    branches:
+      - master
   pull_request:
     branches:
       - master
@@ -12,7 +15,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: bahmutov/npm-install@v1
 
-      - uses: posva/size-check-action@v1.0.2
+      - uses: posva/size-check-action@v1.1.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           build_script: size