Simplify default cache_key

[paulfalgout]

I think the current cache_key might be overly unique. 'cache-{{ arch }}-{{ .Branch }}-{{ checksum "package.json" }}' It seems to me that including {{ .Branch }} is reducing the value of caching npm. If the checksum of package.json is the same and the architecture is the same, you'd want to reuse the cache would you not?

[samuelboland]

I assume there's some reason that this is the default. That being said, I agree with you. My configuration, with irrelevant parts stripped out, is now:

- cypress/install:
  cache-key: cache-{{arch}}-{{ checksum "package.json"}}
- cypress/run:
  cache-key: cache-{{arch}}-{{ checksum "package.json"}}

This cut my cypress/install step from 2m 16s to 1m 51s. (The remaining time is due to issues unrelated to this post.)

[jennifer-shehane]

The current cache-key in 3.0.0 of the orb is now cypress-cache-{{ arch }}-{{ checksum "package.json" }}. Closing as resolved.