Allow non-persisted queries from GraphiQL only in dev mode
Allow non-persisted queries from GraphiQL only in dev mode

Fixes: #117

sysgears/apollo-fullstack-starter-kit,sysgears/apollo-universal-starter-kit,josephdburdick/apollo-fullstack-starter-kit,sysgears/apollo-universal-starter-kit,sysgears/apollo-universal-starter-kit,sysgears/apollo-universal-starter-kit