Github release workflow

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: Release to RubyGems
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+
+      - name: Build gem
+        run: gem build datagrid.gemspec
+
+      - name: Push gem to RubyGems
+        env:
+          RUBYGEMS_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}
+        run: gem push datagrid-*.gem