Fix generation enum numbers as strings one

[sanyaches]

Hi there! I face the problem that enum of numbers generates well in request params with extractRequestParams: true option, but for usual schemas library generates the same enum like enum of strings.

Library version: 12.0.4

Spec file example:
in requestBody - "someTypeId":{"type":"integer","enum":[1,2]} => export type SomeTypeId = "1" | "2"
in parameters -> query "someTypeId":{"type":"integer","enum":[1,2]} (1:1 as above) => export type SomeTypeId = 1 | 2;

Actual behavior: export type SomeTypeId = "1" | "2";

script

generateApi({
    output: path.resolve(
        process.cwd(),
        myCustomOutputPath,
    ),
    url: myCustomOpenapiYamlUrl,
    generateClient: false,
    extractRequestParams: true,
    extractRequestBody: true,
    extractResponseBody: true,
    extractResponseError: true,
    extractEnums: true,
    disableStrictSSL: true,
    modular: true,
    cleanOutput: true,
    patch: true,
    typePrefix: myCustomPrefix,
    generateUnionEnums: true,
});

[sanyaches]

Just checked this, doesn't reproduce anymore

"swagger-typescript-api": "^13.0.13",