message: ci: use maxWorkers=2 for jest
  It should avoid memory problems on CircleCI
diff: #
  version: 2
  -
  jobs:
  build:
  docker:
  @@ -15,7 +14,6 @@ jobs:
  steps:
  - checkout
  - # Download and cache dependencies
  - restore_cache:
  keys:
  - dependencies-cache-{{ checksum "yarn.lock" }}
  @@ -29,8 +27,10 @@ jobs:
  - node_modules
  key: dependencies-cache-{{ checksum "yarn.lock" }}
  - # run tests!
  - - run: yarn run test
  + - run:
  + - yarn run test:types
  + - yarn run test:unit --maxWorkers=2
  + - yarn build
  - run:
  name: Send code coverage
  