Consistent naming for *-directory options

[AndrewFinlay]

Expected Behavior

Should be able to use --temp-dir --report-dir and/or --temp-directory --report-directory
Not a big issue but one that's annoying while configuring nyc, and it should be an easy fix.

Observed Behavior

Must use --temp-directory and --report-dir

Bonus Points! Code (or Repository) that Reproduces Issue

N/A

Forensic Information

Should be able to do this with a few yargs aliases, let me know if you'd like a PR

[coreyfarrell]

I'm leaning towards adding a --temp-dir option and making --temp-directory deprecated, or at least undocumented. My preference is that we not have two officially documented ways. yargs is outside my area of knowledge so I'm unsure how this would be accomplished. If you'd like to submit a PR that would be nice.

[AndrewFinlay]

Hi Corey,

I've put up a PR for this here, #897. It's pretty straight forward aside from how to test that the deprecated command still works.