Makefile in twilio-ruby-5.0.0.rc26 vs Makefile in twilio-ruby-5.0.0

@@ -1,15 +1,22 @@
+.PHONY: test lint-changed lint
+
+CHANGED_RUBY_FILES = $(shell git status --porcelain | grep ".rb" | awk -F ' ' '{print $2}' | tr '\n' ' ')
+
 install:
 	bundle install; bundle exec rake install
 
 test-install:
 	bundle install
 
-test:
+test: lint
 	bundle exec rake spec
 
 docs:
 	yard doc
+
+lint:
+	rubocop --cache true --parallel
 
 authors:
 	echo "Authors\n=======\n\nA huge thanks to all of our contributors:\n\n" > AUTHORS.md
 	git log --raw | grep "^Author: " | cut -d ' ' -f2- | cut -d '<' -f1 | sed 's/^/- /' | sort | uniq >> AUTHORS.md