Run build workflow also on main branch (#211)

Author: nfx

.github/workflows/push.yml

@@ -5,6 +5,14 @@ on:
     types: [opened, synchronize]
   merge_group:
     types: [checks_requested]
+  push:
+    # Always run on push to main. The build cache can only be reused
+    # if it was saved by a run from the repository's default branch.
+    # The run result will be identical to that from the merge queue
+    # because the commit is identical, yet we need to perform it to
+    # seed the build cache.
+    branches:
+      - main
 
 env:
   HATCH_VERSION: 1.7.0
@@ -33,12 +41,10 @@ jobs:
         run: pip install hatch==$HATCH_VERSION
 
       - name: Verify linting
-        run: |
-          hatch run lint:verify
+        run: hatch run lint:verify
 
       - name: Run unit tests
-        run: |
-          hatch run unit:test
+        run: hatch run unit:test
 
       - name: Publish test coverage
         uses: codecov/codecov-action@v3