Create news-file.yaml

Author: hexagonrecursion

.github/workflows/news-file.yaml

@@ -0,0 +1,13 @@
+on:
+  pull_request:
+    types: [labeled, unlabeled, opened, reopened, synchronize]
+jobs:
+  check-news-file:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          # `towncrier check` needs enough history to run `git diff --name-only origin/main...`
+          fetch-depth: 0
+      - run: pipx run towncrier check --compare-with origin/main
+        if: ${{ ! (contains(github.event.pull_request.labels.*.name, 'trivial')) }}