Adds Actions to automatically adds 'B-out-of-date' label

.github/workflows/main.yml

@@ -5,12 +5,41 @@ on:
     - main
 concurrency: dev-${{ github.ref }}
 jobs:
-  windows:
+  build-windows:
     name: Build
     uses: ./.github/workflows/ci-windows.yml
-  linux:
+  build-linux:
     name: Build
     uses: ./.github/workflows/ci-linux.yml
-  mac:
+  build-mac:
     name: Build
     uses: ./.github/workflows/ci-mac.yml
+  housekeep:
+    name: Housekeep
+    runs-on: ubuntu-latest
+    steps:
+    - name: Update PRs
+      run: |
+        import { Octokit } from 'octokit';
+
+        const octokit = new Octokit({ auth: '${{ secrets.GITHUB_TOKEN }}' });
+        const owner = '${{ github.event.repository.owner.login }}';
+        const repo = '${{ github.event.repository.name }}';
+        const resp = await octokit.request('GET /repos/{owner}/{repo}/pulls', {
+          owner,
+          repo,
+          base: '${{ github.ref_name }}',
+          sort: 'updated',
+          direction: 'desc',
+          per_page: 100,
+        });
+
+        for (const pull of resp.data) {
+          await octokit.request('POST /repos/{owner}/{repo}/issues/{issue_number}/labels', {
+            owner,
+            repo,
+            issue_number: pull.number,
+            labels: ['B-out-of-date'],
+          });
+        }
+      shell: node --input-type=module {0}