Add upgrade-deps workflow.

.github/workflows/upgrade-deps.yaml

@@ -0,0 +1,21 @@
+---
+name: Upgrade Dependencies
+on: [workflow_dispatch]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '16'
+      - run: git config --global user.email "pakkun@cliffano.com"
+      - run: git config --global user.name "pakkunbot"
+      - run: npm install -g bob
+      - run: bob updep build
+      - run: git commit -am "Upgrade dependencies to latest"
+      - uses: ad-m/github-push-action@master
+        with:
+          tags: true
+          github_token: ${{ secrets.BUILD_TOKEN }}
+          branch: ${{ github.ref }}

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 - Add node 15 and 16 to CI workflow
+- Add upgrade-deps workflow
 
 ## 2.1.0 - 2021-07-17
 ### Added