Add simpleEnumValues option documentation

Signed-off-by: Alan Cha <[email protected]>

Author: Alan-Cha

packages/openapi-to-graphql/README.md

@@ -162,6 +162,8 @@ Schema options:
 
 - `simpleNames` (type: `boolean`, default: `false`): By default, field names are sanitized to conform with GraphQL conventions, i.e. types should be in PascalCase, fields should be in camelCase, and enum values should be in ALL_CAPS. This option will prevent OpenAPI-to-GraphQL from enforcing camelCase field names and PascalCase type names, only removing illegal characters and staying as true to the provided names in the OAS as possible. 
 
+- `simpleEnumValues` (type: `boolean`, default: `false`): By default, field names are sanitized to conform with GraphQL conventions, i.e. types should be in PascalCase, fields should be in camelCase, and enum values should be in ALL_CAPS. This option will prevent OpenAPI-to-GraphQL from enforcing ALL_CAPS enum values, only removing illegal characters and staying as true to the provided enum values in the OAS as possible. 
+
 - `singularNames` (type: `boolean`, default: `false`): Experimental feature that will try to create more meaningful names from the operation path than the response object by leveraging common conventions. For example, given the operation `GET /users/{userId}/car`, OpenAPI-to-GraphQL will create a `Query` field `userCar`. Note that because `users` is followed by the parameter `userId`, it insinuates that this operation will get the car that belongs to a singular user. Hence, the name `userCar` is more fitting than `usersCar` so the pluralizing 's' is dropped. This option will also consider irregular plural forms.
 
 - `createSubscriptionsFromCallbacks` (type: `boolean`, default: `false`): Generates subscription fields from [callback objects](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#CallbackObject). The keys ([runtime expressions](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#runtimeExpression)) of the callback objects will be interpolated as the topic of a publish/subscription connection using [graphql-subscriptions](https://github.com/apollographql/graphql-subscriptions). Read the [doc](./docs/subscriptions.md) for explanations and examples regarding its usage.