Merge pull request #3253 from aldesantis/chore/aldesantis/circleci-2-1

Upgrade to CircleCI 2.1

Author: kennyadsl

.circleci/config.yml

@@ -1,4 +1,4 @@
-version: 2
+version: 2.1
 jobs:
   postgres: &postgres
     working_directory: &workdir ~/solidus
@@ -27,7 +27,7 @@ jobs:
       - run: |
           bundle install --path=vendor/bundle
 
-      - cache-save:
+      - save_cache:
           key: solidus-gems-v1-{{ .Branch }}-{{ checksum "Gemfile.lock" }}
           paths:
             - vendor/bundle
@@ -72,7 +72,6 @@ jobs:
       RAILS_VERSION: '~> 5.1.0'
 
 workflows:
-  version: 2
   build:
     jobs:
       - postgres