Create gem-push.yml

.github/workflows/gem-push.yml

+name: Ruby Gem
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    name: Build + Publish
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby 2.6
+      uses: actions/setup-ruby@v1
+      with:
+        ruby-version: 2.6.x
+
+    - name: Publish to GPR
+      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: "Bearer ${{secrets.RUBYGEMS_AUTH_TOKEN}}"