Add workflow for creating a release tag

.github/workflows/create-tag.yml

@@ -0,0 +1,14 @@
+name: Create release tag
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+        with:
+          # Fetches entire history, so we can analyze commits since last tag
+          fetch-depth: 0
+      - name: Bump version and push tag
+        uses: mathieudutour/github-tag-action@v4.5
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}