ci: Add CI to main pushes (#307)

.github/workflows/ci.yaml

@@ -2,7 +2,12 @@ name: CI
 
 on:
   pull_request:
-    branches: [main]
+    branches:
+      - main # Trigger CI on PRs to main
+
+  push:
+    branches:
+      - main # Trigger CI on pushes to main
 
 jobs:
   exchange:

.github/workflows/license-check.yml

@@ -1,13 +1,21 @@
 ---
 name: License Check
 
-"on":
-  pull_request:
+on:
+  pull_request: # Trigger license check on any PRs
     paths:
       - '**/pyproject.toml'
       - '.github/workflows/license-check.yml'
       - '.github/workflows/scripts/check_licenses.py'
 
+  push: # Trigger license check on pushes to main
+    branches:
+      - main
+    paths: # TODO: can't DRY unless https://github.com/actions/runner/issues/1182
+      - '**/pyproject.toml'
+      - '.github/workflows/license-check.yml'
+      - '.github/workflows/scripts/check_licenses.py'
+
 jobs:
   check-licenses:
     name: Check Package Licenses