Convert to Github Actions

.github/workflows/tests.yml

@@ -0,0 +1,18 @@
+ 
+name: Squib Unit Tests
+
+on: [push]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Ruby 2.6
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 2.6
+        # bundler-cache: true
+    - run: bundle install
+    - run: bundle exec rake
+    

.travis.yml

@@ -1,17 +0,0 @@
-language: ruby
-sudo: true # need this for libgirepository1.0-dev
-addons:
-  apt:
-    packages:
-      - libgirepository1.0-dev # for gobject-introspection
-rvm:
-  - 2.4.2
-  - 2.5.3
-  - 2.6.3
-  - ruby-head
-before_install:
-  - gem update --system
-  - gem install bundler
-matrix:
-  allow_failures:
-    - rvm: ruby-head

appveyor.yml

@@ -1,25 +0,0 @@
-version: '{build}'
-
-skip_tags: true
-
-environment:
-  matrix:
-    - ruby_version: "24"
-    - ruby_version: "24-x64"
-    - ruby_version: "25"
-    - ruby_version: "25-x64"
-    - ruby_version: "26"
-    - ruby_version: "26-x64"
-
-install:
-  - SET PATH=C:\Ruby%ruby_version%\bin;%PATH%
-  - ruby --version
-  - gem --version
-  - gem install bundler
-  - bundler --version
-  - bundle install
-
-test_script:
-  - rake
-
-build: off