Add Prettier Pre-Commit Hook

[frytyler]

As I was working on Jest test conversions I noticed small little inconsistencies with conventions so this PR is adding Prettier as a precommit hook.

The way it works is any js,json files that are staged will have prettier on them applied right before git commit is ran. It will clean up any small syntax issues to enforce a consistent convention. I set the pretty flags to my personal preference however that can be updated easily.

Prettier setup:

prettier --write --trailing-comma es5 --single-quote --tab-width 4

• Trailing commas in objects not functions.
• single quote for arguments.
• tab width set to 4 spaces.

I would suggest getting a prettier package for whichever editor you are using and put Format on save on, however this will catch changes going forward.

All current .js, .json files have been prettiered.

Note Once #6 is merged this PR will be easier to remove.

Closes #8

[tizmagik]

Sweet, thank you! I'll merge this after #6 lands.

I created an issue and added a Hacktoberfest label for ya 😁

[tizmagik]

--tab-width 2 please 😁

[tizmagik]

@frytyler why the close?

[tizmagik]

Oh I see you opened another PR, 👍