Merge pull request #341 from ruby/use-ruby-actions

Unify workflow files

Author: hsbt

.github/workflows/ubuntu.yml renamed to .github/workflows/test.yml

@@ -4,10 +4,18 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        os: [ 'ubuntu-latest', 'macos-latest', 'windows-latest' ]
         ruby: [ 2.6, 2.5, 2.4, 2.3, 2.2, jruby, jruby-head, truffleruby, ruby-head ]
+        exclude:
+          - os: windows-latest
+            ruby: truffleruby
+          - os: windows-latest
+            ruby: jruby-head
+          - os: windows-latest
+            ruby: jruby
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1