Adding support for graphql (#1982)

* Initial GraphQL implementation

This is the bare minimum amount of code to make graphql work. Turns out it's pretty easy to add support for other languages :)

* Fixing support for `graphql` parsing

There was a few structural changes with the addition of CSS and Typescript that we had to take into account.

* Fixing file glob, adding `graphql` to yarn.lock

* Removing extraneous file

* Adding `graphql` parser, style changes

* Splitting out graphql printer

* Removing merge conflict

* Fixing yarn.lock

* Addressing code review, using `createError`

* Adding release config

* Using exact version

* Removing destructuring

bin/prettier.js

@@ -97,7 +97,8 @@ function getParserOption() {
     value === "flow" ||
     value === "babylon" ||
     value === "typescript" ||
-    value === "postcss"
+    value === "postcss" ||
+    value === "graphql"
   ) {
     return value;
   }