2.0.0: Language support for the June 2018 GraphQL Specification

This release represents a major rewrite of the plugin to address the limitations in 1.x.

The key changes are:

• Support for the June 2018 GraphQL specification including SDL (#118, #133, #137, #129, #141, #144, #150, #164)
• Support for multiple schemas using graphql-config (#84, #125, #140, #145, #164)
• Replaced Node.js based language service with native parser, lexer, and graphql-java to be compatible with all IDEs based on the IntelliJ Platform (#62, #164)
• A dedicated documentation site at https://jimkyndemeyer.github.io/js-graphql-intellij-plugin/

A huge thank you to all the testers and the JetBrains WebStorm team for their assistance.