message: ci: update key cache to have more cache hits
  With this change we should get more cache hit rates since previously all PRs had a different cache key
diff: # (Using the tag in not necessary when pinning by ID, but include it anyway for documentation purposes.)
  # **NOTE 2**: If you change the version of the docker images, also change the `cache_key` suffix.
  var_1: &docker_image circleci/node:10.16-browsers@sha256:d2a96fe1cbef51257ee626b5f645e64dade3e886f00ba9cb7e8ea65b4efe8db1
  -var_2: &cache_key v2-nguniversal-{{ .Branch }}-{{ checksum "yarn.lock" }}-node-10.16
  +var_2: &cache_key v2-nguniversal-{{ checksum "yarn.lock" }}-{{ checksum "WORKSPACE" }}-node-10.16
  # Settings common to each job
  var_3: &job_defaults
  