Parcel: Infrastructure improvements

[aweary]

Hello 👋

I was looking at contributing to parcel, and noticed a few things that would make it easier for you and others to maintain and contribute to the project. I thought I would just list them in one big issue.

• [x] Enforce a style. I would recommend using prettier with pre-commit hooks
• [x] Get Travis CI setup
• [x] Add a CONTRIBUTING.md document with a basic overview of how someone can get started contributing to parcel

• [x] Add a build script

• [x] Consider typing the code base. This is mostly just personal preference, but I find it easier to contribute/maintain typed code. Flow would be a good option if you were open to it 😃

cc @devongovett, thanks!

[yeskunall]

To add to the list, I think it would be easier to contribute if every module (class, helper, util) came with a small description as to what it does, as do some of them already. Was browsing through the repo and noticed that I had to really dig into the code to see what was going on 😆 but maybe that's just me.

[albizures]

hey @aweary, there is already a build command #L60

[aweary]

@albizures I mean for building the source.

[albizures]

lol, sorry 🤣

[jamiebuilds]

I'm taking on all these btw

[aweary]

@thejameskyle happy to contribute if you want to delegate anything.

[jamiebuilds]

@aweary Sweet, I've worked through a number of the items already. I'll add Flow to the project and then we can iterate on adding more and more types

[jamiebuilds]

Moving to #35