Circle CI config improvements

Author: jdee

.circleci/config.yml

@@ -24,11 +24,11 @@ jobs:
       - run:
           name: install dependencies
           command: |
-            bundle install --jobs=4 --retry=3 --path vendor/bundle
+            bundle check || bundle install --jobs=4 --retry=3 --path vendor/bundle
 
       - save_cache:
           paths:
-            - ./venv
+            - ./vendor
           key: v1-dependencies-{{ checksum "Gemfile" }}
 
       # run tests!