dip.yml in string_tools-0.15.0 vs dip.yml in string_tools-0.16.0

@@ -1,10 +1,10 @@
 version: '1'
 
 environment:
-  DOCKER_RUBY_VERSION: 2.2
-  RUBY_IMAGE_TAG: 2.2-latest
+  DOCKER_RUBY_VERSION: 2.3
+  RUBY_IMAGE_TAG: 2.3-latest
   COMPOSE_FILE_EXT: development
   RAILS_ENV: test
 
 compose:
   files:
@@ -31,11 +31,12 @@
     service: app
     command: bundle exec appraisal bundle exec rspec
 
   clean:
     service: app
-    command: rm -f Gemfile.lock gemfiles/*.gemfile.*
+    command: rm -rf Gemfile.lock gemfiles
 
 provision:
   - docker volume create --name bundler_data
+  - dip clean
   - dip bundle install
   - dip appraisal install