Merge pull request #656 from johnnyshields/rubocop-initial-commit

Add Rubocop + some basic fixes

.github/workflows/rubocop.yml

@@ -0,0 +1,24 @@
+---
+name: Rubocop
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      CI: true
+      TESTOPTS: '-v'
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Ruby 3.0
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.0
+          bundler-cache: true
+
+      - name: Install dependencies
+        run: bundle install
+
+      - name: Run RuboCop
+        run: bundle exec rubocop --parallel

.rubocop.yml

@@ -0,0 +1,17 @@
+inherit_from: .rubocop_todo.yml
+
+require:
+  - rubocop-minitest
+  - rubocop-performance
+  - rubocop-rake
+
+AllCops:
+  TargetRubyVersion: 2.6
+  NewCops: enable
+  Include:
+    - 'lib/**/*'
+  Exclude:
+    - '**/*.xsd'
+    - '.git/**/*'
+    - 'tmp/**/*'
+    - 'vendor/**/*'