message: Fix unhandled passthroughCustomScalars option in Flow generator
diff: @@ -36,7 +36,7 @@ export function typeNameFromGraphQLType(context, type, bareTypeName, nullable =
  if (type instanceof GraphQLList) {
  typeName = `Array< ${typeNameFromGraphQLType(context, type.ofType, bareTypeName)} >`;
  } else if (type instanceof GraphQLScalarType) {
  - typeName = builtInScalarMap[type.name] || (context.passthroughCustomScalars ? context.customScalarsPrefix + type.name : 'any');
  + typeName = builtInScalarMap[type.name] || (context.options.passthroughCustomScalars ? context.options.customScalarsPrefix + type.name : 'any');
  } else {
  typeName = bareTypeName || type.name;
  }
  