build: add linter to make code style closer to Node.js'

[bcoe]

adds a linter that enforces a coding style closer to Node core's.

Note: this will make it easy to drop code directly into the codebase when the time comes.

Fixes #3

[iansu]

Nice! Do we want to publish the eslint plugin and/or move it to the pkgjs org before merging this?

[bcoe]

@iansu perhaps that's worth doing, @mhdawson are you able to transfer @iansu's eslint preset into pkgjs, and give his npm user access to the organization on npm?

Alternatively, if you gave oss-bot write access to the org, I could setup automated publication, like I have for yargs, see:

https://www.npmjs.com/package/yargs

[bcoe]

_Note: we should probably opt for @pkgjs/eslint-plugin-node-core, rather than eslint-plugin-node-core, as eslint-plugin-node-core was published a few years ago by Joyee.

[joesepi]

LGTM. Thanks.

[joesepi]

Can this be a const?

[bcoe]

I think so, this edit was made automatically by linter.

[bcoe]

@iansu we can follow up getting rid of the git dependency.