ci: Automatically try to update packages (#551)

.github/workflows/excavator.yml

@@ -0,0 +1,17 @@
+on:
+  workflow_dispatch:
+  schedule:
+    # run every 4 hours
+    - cron: '20 */4 * * *'
+name: Excavator
+jobs:
+  excavate:
+    name: Excavate
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@main
+    - name: Excavate
+      uses: ScoopInstaller/GithubActions@main
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        SKIP_UPDATED: '1'