message: Javascript Floats are double precision, so the correct corresponding Swift type should be Float, not Double.
diff: @@ -22,7 +22,7 @@ import {
  const builtInScalarMap = {
  [GraphQLString.name]: 'String',
  [GraphQLInt.name]: 'Int',
  - [GraphQLFloat.name]: 'Float',
  + [GraphQLFloat.name]: 'Double',
  [GraphQLBoolean.name]: 'Bool',
  [GraphQLID.name]: 'GraphQLID',
  }
  