added new workflow for version

Sometimes I forget to bump the version. So here is an action to check and yell at me when I forget

.github/workflows/check-version-bump.yml

@@ -0,0 +1,23 @@
+name: Check Version Bump
+on:
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  check-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: johnnybenson/package-json-versioned-action@v1.0.5
+        id: package-json
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - run: echo "has-updated -- ${{ steps.package-json.outputs.has-updated }}"
+      - run: echo "previous-version -- ${{ steps.package-json.outputs.previous-version }}"
+      - run: echo "version -- ${{ steps.package-json.outputs.version }}"
+      # the action will fail if the version has not been updated
+      - run: |
+          if [ "${{ steps.package-json.outputs.has-updated }}" = "false" ]; then
+              echo "The version has not been updated"
+              exit 1
+          fi