Auto prettify

[rybon]

Dependent on graphql/graphiql#830

Extends the graphiql option to alternatively accept an object instead of a boolean. This object has a field called autoPrettify that when set to true will pass the autoPrettify prop to the GraphiQL component, that will in turn run the prettify method when it mounts. This means stripped GraphQL queries will automatically be pretty printed when opened in the GraphiQL editor.

[coveralls]

Coverage increased (+0.001%) to 99.391% when pulling 4065322 on rybon:master into a17df73 on graphql:master.

[rybon]

@IvanGoncharov please review.

[IvanGoncharov]

@rybon I have some minor review comments but the main issue here if GraphiQL maintainers will accept this fix or not.
If it's merged into GraphiQL I would happily help you to get this PR in shape and merge it.

[rybon]

Yes, I agree. Lets wait and see what they think. Thanks for your feedback!

[IvanGoncharov]

@rybon I liked your approach in this PR so I borrowed some ideas in #508.

[rybon]

Cool!

[rybon]

@IvanGoncharov following on the discussion in graphql/graphiql#830, would it be possible to extend the options object with a callback field that can be called on every query, so we can make use of the defaultQuery prop in GraphiQL? Something like: transformDefaultQuery: (query) => print(parse(queryFromUrlBar)), where we pass the result to the defaultQuery prop?

I'm curious what you think. I think I can make a PR that would look very similar to this one based on this approach.

[IvanGoncharov]

@rybon I'm not sure about this proposal I need to think about it.