message: try to get caching working for yarn
diff: @@ -6,7 +6,16 @@ jobs:
  steps:
  - checkout
  - run: 'git submodule update --init --recursive'
  + - restore_cache:
  + keys:
  + - v1-yarn-deps-{{ checksum "yarn.lock" }}-{{ arch }}
  + - v1-yarn-deps-
  - run: 'yarn'
  + - save_cache:
  + key: v1-yarn-deps-{{ checksum "yarn.lock" }}-{{ arch }}
  + paths:
  + - ~/.cache/yarn
  + - ./node_modules
  - run: 'yarn run client-build-osx'
  - store_artifacts:
  path: ./build/prod-client-build/osx64-package.zip
  