version
v0.8.152

problem
When I make a typo on the squint command line, it exits with success (zero).
This is not a big issue for interactive use, but most folks would like their build scripts to fail fast if they've invoked squint incorrectly.

repro

npx squint blarg

expected behavior
Exit with non-zero with incorrect usage error (and perhaps, usage help).

actual behavior
squint emits no output and exits with zero.

next steps
Happy to create a PR if you agree that this is interesting to address.