Update tooling

[ismay]

• Add greenkeeper and greenkeeper-lockfile (Update dependencies to enable Greenkeeper 🌴 #61)
• Add prettier (Add prettier #43, Add husky for lint-staged #44)
• Add lintstaged (Add prettier #43, Add husky for lint-staged #44)

[ismay]

@mxstbr I've sent a request to add greenkeeper to this repo. I've used it on almost all of my projects and have had nothing but good experiences with. It'll run our ci tests for new versions of dependencies within our specified range, to test whether they're breaking anything. If so, it'll notify us.

And for updates outside of the range in package.json it'll open a pr. In my opinion a great way to outsource/automate part the work of keeping an eye on dependencies.

[mxstbr]

Sure!

[ismay]

Cool, thanks!

[ismay]

@mxstbr Seems I can't enable greenkeeper on this repo without admin rights. Would you mind enabling it under this repo's settings > integrations & services > greenkeeper? I can take care of the rest.

[mxstbr]

Wait I thought I enabled it?

[mxstbr]

There we go: #61