create workflow for bumping version (#24)

.github/workflows/bump-version.yml

@@ -0,0 +1,26 @@
+name: Bump version
+on:
+  pull_request:
+    types:
+      - closed
+    branches:
+      - master
+
+jobs:
+  build:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: write
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        ref: ${{ github.event.pull_request.merge_commit_sha }}
+        fetch-depth: '0'
+
+    - name: Bump version and push tag
+      uses: anothrNick/github-tag-action@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        WITH_V: true
+        PRERELEASE: true