graphql-code-generator: Enums are generated incorrectly

Describe the bug Graphql Enums have keys and values. Seems graphql-codegen uses only keys for generaring enums in typescript.

See example below:

// Such GQL enum 
new GraphQLEnumType({
	name: 'FvFormFillerServiceControlTypes',
	values: {
		Text1: {
			value: 'lala'
		}
	}
})

// will be converted into such typescript enum:

export enum GQLFvFormFillerServiceControlTypes {
  Text1 = 'Text1',
}

// Expected typescript enum is:
export enum GQLFvFormFillerServiceControlTypes {
  Text1 = 'lala',
}