ci: autocancel repeated runs & pass job (#33)

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

.github/workflows/ci.yml

@@ -7,6 +7,10 @@ on:
     branches:
     - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   FORCE_COLOR: 3
 
@@ -24,3 +28,13 @@ jobs:
     - uses: actions/checkout@v3
     - uses: wntrblm/nox@main
     - run: nox
+
+  pass:
+    if: always()
+    needs: [checks]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Decide whether the needed jobs succeeded or failed
+      uses: re-actors/alls-green@release/v1
+      with:
+        jobs: ${{ toJSON(needs) }}