Automate GitHub Workflow updates

.github/workflows/proaction.yaml

@@ -0,0 +1,19 @@
+on:
+  schedule:
+    - cron:  "0 0 * * *"
+
+jobs:
+  run-proaction:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: proactionhq/proaction/action@v0.4.7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: peter-evans/create-pull-request@v2
+        with:
+          commit-message: "[proaction] updating workflow"
+          title: Updating workflow from Proaction
+          token: $${{ secrets.PROACTION_TOKEN }}