test for gql files in graphql-tag/loader

Created by: Findiglay

#4831 (closed)

Added support for .gql files.

graphql-tag/loader now supports both .graphql and .gql files. Files with the.gql extension allow the import of graphql operations by name.

e.g.

import { MyQuery1, MyQuery2 } from 'query.gql'

For graphql-tag/loader documentation, see: https://github.com/apollographql/graphql-tag#webpack-preprocessing-with-graphql-tagloader