ci: use release-please to tag releases

.github/workflows/tests.yml

@@ -36,7 +36,7 @@ jobs:
       matrix:
         include:
           - nvim_tag: v0.8.3
-          - nvim_tag: v0.9.0
+          - nvim_tag: v0.9.1
 
     name: Run tests
     runs-on: ubuntu-22.04
@@ -52,3 +52,27 @@ jobs:
       - name: Run tests
         run: |
           bash ./run_tests.sh
+
+  release:
+    name: release
+
+    if: ${{ github.ref == 'refs/heads/master' }}
+    needs:
+      - luacheck
+      - stylua
+      - run_tests
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        id: release
+        with:
+          release-type: simple
+          package-name: oil.nvim
+      - uses: actions/checkout@v3
+      - uses: rickstaa/action-create-tag@v1
+        if: ${{ steps.release.outputs.release_created }}
+        with:
+          tag: stable
+          message: "Current stable release: ${{ steps.release.outputs.tag_name }}"
+          tag_exists_error: false
+          force_push_tag: true