Support GraphQLID

Closes: #187

Summary:

Adds support to specifying a field being of type GraphQLID. Add `format: id` or `format: uuid`.

Test Plan:

1. Change directory to `packages/openapi-to-graphql`
2. Run `npm run start_dev`
3. Browse to localhost:3000/graphql
4. Click on "Docs"
5. Click on "Query"
6. Observe the type of properties whose names end with "id"

Before:

company(id: String!): Company
office(accept: Accept, id: Int!): Office
productWithId(productId: String!, productTag: String!): ProductWithId
productsReviews(id: String!, limit: Int, productTag: String): [ProductsReviewsListItem]

After:

company(id: ID!): Company
office(accept: Accept, id: ID!): Office
productWithId(productId: ID!, productTag: String!): ProductWithId
productsReviews(id: ID!, limit: Int, productTag: String): [ProductsReviewsListItem]

7. Click on "Company"
8. Observe the type of "id"

Before:

id: String
The identifier of a company

After:

id: ID
The identifier of a company

9. Click "Back" twice
10. Click on "Mutation"
11. Click on "ProductWithIdInput"
12. Observe the type of "productId"

Before:

productId: String
The id of the product

After:

productId: ID
The id of the product

Signed-off-by: Omar Chehab <[email protected]>

Author: omarchehab98

package.json

@@ -5,7 +5,7 @@
     "test": "cd packages/openapi-to-graphql/ && npm test"
   },
   "devDependencies": {
-    "@types/jest": "^24.0.15",
+    "@types/jest": "^24.0.16",
     "graphql": "^14.0.2",
     "jest": "^24.8.0",
     "lerna": "^3.4.3",

packages/openapi-to-graphql-cli/lib/openapi-to-graphql.js

@@ -154,6 +154,8 @@ Schema options:
 
 - `addLimitArgument` (type: `boolean`, default: `false`): Add a `limit` argument to fields returning lists of objects/lists that will limit the number of returned elements, selecting the first `n` elements of the list.
 
+- `idFormats` (type: `string[]`): If a schema is of type string and has format UUID, it will be translated into a [GraphQL ID type](https://graphql.org/graphql-js/type/#graphqlid). To allow for more customzation, this option allows users to specify other formats that should be interpreted as ID types. 
+
 ***
 
 Resolver options:

packages/openapi-to-graphql/README.md

@@ -86,7 +86,7 @@ export declare function instantiatePathAndGetQuery(path: string, parameters: Par
  * Returns the "type" of the given JSON schema. Makes best guesses if the type
  * is not explicitly defined.
  */
-export declare function getSchemaType(schema: SchemaObject): string | null;
+export declare function getSchemaType(schema: SchemaObject, data: PreprocessingData): string | null;
 /**
  * Determines an approximate name for the resource at the given path.
  */