When enabeling --useDateType send the correct information to @hey-api/openapi-ts #137

Is your feature request related to a problem? Please describe.

  types: {
    dates: 'types+transform',
  },

in the configuration to @hey-api/openapi-ts currently i think it sends true but I'm not 100% sure, it seems it is done here

Documentation about the feature can be found here

Describe the solution you'd like
When this is done correctly both the typescript defintion should use the type Date and also the result should be Date.