Mutation code breaks if method returns void.

[aatif-lahore]

graphql-relay-js/src/mutation/mutation.js

Line 107 in 481cae9

payload.clientMutationId = input.clientMutationId;

I am using loopback-graphql-relay package in my project. There are few loopback methods that don't return anything. For those methods graphql-relay's code break.

Below is the example mutation.

mutation { User { UserResetPassword (input:{options:{email:"user@example.com"}}) { obj clientMutationId } } }

[IvanGoncharov]

Fixed by #268