v0.7.8
- add extensions support @ #448
- lexer: fixes panic on empty blockstrings @ #456
- lexer: simplify lexer.TokenType @ #433
- resolvers: support custom map types @ #440
- thread-safety: added Result.AppendErrors @ #434
- fix panic when mutations or subscriptions are not configured @ #431
- errors: consolidates original error for re-usability @ #427