`prettier-check --help` doesn't work

[samuela]

I'm on prettier-check 2.0.0.

bobthebuilder -> yarn prettier-check --help
yarn run v1.12.3
$ /Users/skainswo/dev/kumo/bobthebuilder/node_modules/.bin/prettier-check --help
All files using prettier code style.
✨  Done in 0.33s.

[samuela]

Same thing with -h.