Add GitHub Actions CI workflow.

Author: thomthom

.github/README.md

@@ -1,6 +1,6 @@
 # SketchUp Ruby API Stubs
 
-[![Gem Version](https://badge.fury.io/rb/sketchup-api-stubs.svg)](https://badge.fury.io/rb/sketchup-api-stubs) [![Build status](https://ci.appveyor.com/api/projects/status/6l5tqoawh44lut66/branch/master?svg=true)](https://ci.appveyor.com/project/thomthom/ruby-api-stubs/branch/master)
+[![Gem Version](https://badge.fury.io/rb/sketchup-api-stubs.svg)](https://badge.fury.io/rb/sketchup-api-stubs) ![Build status](https://github.com/thomthom/skippy/actions/workflows/rake.yaml/badge.svg?branch=main)
 
 Auto-generated stubs for the SketchUp Ruby API. Useful for IDE intellisense and auto-complete.
 

.github/workflows/rake.yaml

@@ -0,0 +1,48 @@
+name: Rake
+
+on:
+  push:
+    branches: [ main, master, dev/github-actions ]
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  workflow_dispatch:
+
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
+jobs:
+  rake:
+    name: >-
+      OS ${{ matrix.os }}, Ruby ${{ matrix.ruby }}
+    env:
+      CI: true
+
+    runs-on: ${{ matrix.os }}
+    if: |
+      !(   contains(github.event.pull_request.title,  '[ci skip]')
+        || contains(github.event.pull_request.title,  '[skip ci]'))
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ macos-12, windows-2022 ]
+        ruby: [ 2.7 ]
+
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Setup Ruby
+        uses: ruby/setup-ruby-pkgs@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+        timeout-minutes: 10
+
+      - name: Run rake
+        timeout-minutes: 10
+        run: bundle exec rake