v1.1.0

Included a new fast experimental executor that retrieves resolvers in query build time instead of runtime.

Changelog

• Use promise 2.0
• Support for dataloader
• Use is_thenable instead of type-checking Promise 2cf4285
• Include experimental executor c496eed
• Errors are now None if empty in ExecutionResult ec97284
• Accept custom middleware in experimental executor b10adc4
• Set the Promises wrap on field resolutions to be optional 29aba38
• Fix leaf type check 7b275a4
• Fix async wait for futures a9744ae
• Allow resolve_type to return a string 0d25124