auto merge dependabot updates (#177)

* auto merge dependadabot updates

* add gh-action-auto-merge-dependency-updates to allowed actions

* update dependency auto merge to version that will approve PR

Co-authored-by: Zeke Sikelianos <zeke@sikelianos.com>

Author: tjenkinson

.github/allowed-actions.js

@@ -31,5 +31,6 @@ module.exports = [
   'repo-sync/github-sync@v2',
   'repo-sync/pull-request@v2',
   'rtCamp/action-slack-notify@master',
-  'rtCamp/action-slack-notify@v2.1.0'
-]
+  'rtCamp/action-slack-notify@v2.1.0',
+  'tjenkinson/gh-action-auto-merge-dependency-updates@cee2ac0'
+]

.github/workflows/automerge-dependencies.yml

@@ -0,0 +1,14 @@
+name: Auto Merge Dependency Updates
+
+on:
+  - pull_request
+  - pull_request_review
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: tjenkinson/gh-action-auto-merge-dependency-updates@cee2ac0
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          allowed-actors: dependabot[bot]