chore(ci): add workflows (#1)

Author: michaellzc

.github/workflows/validate.yml

@@ -0,0 +1,32 @@
+name: validate
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  style:
+    name: code style
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+      - run: bundle exec rbprettier --check .
+
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ["2.4", "2.5", "2.6", "2.7"]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+      - run: bundle exec rake

.prettierignore

@@ -0,0 +1,9 @@
+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/pkg/
+/spec/reports/
+/tmp/
+/vendor/
+Gemfile.lock