Include required in pagination result

[AshotN]

Summary

I was using https://github.com/acacode/swagger-typescript-api to generate a TypeScript client based on the swagger file created by feathers-swagger and one issue I ran across is that pagination results had all optional properties.

Like this

/** Company pagination result */
export interface CompanyPaginationType {
  total?: number;
  limit?: number;
  skip?: number;
  data?: CompanyListType;
}

I believe this is not correct, so this PR address that and the outputted type looks like this now

/** Company pagination result */
export interface CompanyPaginationType {
  total: number;
  limit: number;
  skip: number;
  data: CompanyListType;
}