GraphQL::type modifier support

[stevelacey]

Summary

Adds support for type modifiers and standard types to GraphQL::type.

GraphQL::type('MyInput!');
GraphQL::type('[MyInput]');
GraphQL::type('[MyInput]!');
GraphQL::type('[MyInput!]!');

GraphQL::type('String');
GraphQL::type('String!');
GraphQL::type('[String]');
GraphQL::type('[String]!');
GraphQL::type('[String!]!');

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist

• Existing tests have been adapted and/or new tests have been added
• Add a CHANGELOG.md entry
• Update the README.md
• Code style has been fixed via composer fix-style

[mfn]

Thanks, your further comments and the tests changed my mind!