Add GitHub action for releasing new versions

.github/workflows/gem-push.yml

@@ -0,0 +1,47 @@
+name: Ruby Gem
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    name: Build + Publish
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Ruby 2.6
+    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+    # change this to (see https://github.com/ruby/setup-ruby#versioning):
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 2.6.x
+
+#     - name: Publish to GitHub Package Registry
+#       run: |
+#         mkdir -p $HOME/.gem
+#         touch $HOME/.gem/credentials
+#         chmod 0600 $HOME/.gem/credentials
+#         printf -- "---\n:github: ${GEM_HOST_API_KEY}\n" > $HOME/.gem/credentials
+#         gem build *.gemspec
+#         gem push --KEY github --host https://rubygems.pkg.github.com/${OWNER} *.gem
+#       env:
+#         GEM_HOST_API_KEY: "Bearer ${{secrets.GITHUB_TOKEN}}"
+#         OWNER: ${{ github.repository_owner }}
+
+    - name: Publish to RubyGems
+      run: |
+        mkdir -p $HOME/.gem
+        touch $HOME/.gem/credentials
+        chmod 0600 $HOME/.gem/credentials
+        printf -- "---\n:rubygems_api_key: ${GEM_HOST_API_KEY}\n" > $HOME/.gem/credentials
+        gem build *.gemspec
+        gem push *.gem
+      env:
+        GEM_HOST_API_KEY: "${{secrets.RUBYGEMS_AUTH_TOKEN}}"