Switch to GitHub Actions for CI (#23)

Author: mislav

.github/workflows/test.yml

@@ -0,0 +1,23 @@
+name: Test
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - '2.3'
+          - '2.4'
+          - '2.5'
+          - '2.6'
+          - '2.7'
+          - '3.0'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rake

.travis.yml

@@ -2,6 +2,6 @@ source "https://rubygems.org"
 
 gem "rake"
 gem "rake-compiler"
-gem "test-unit", "~> 2.0.4"
+gem "test-unit", "~> 3.3.9"
 
 gemspec

Gemfile

@@ -6,19 +6,21 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    rake (10.4.2)
-    rake-compiler (0.9.5)
+    power_assert (2.0.1)
+    rake (13.0.6)
+    rake-compiler (1.1.1)
       rake
-    test-unit (2.0.9)
+    test-unit (3.3.9)
+      power_assert
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   rake
   rake-compiler
-  test-unit (~> 2.0.4)
+  test-unit (~> 3.3.9)
   version_sorter!
 
 BUNDLED WITH
-   1.16.1
+   2.2.29