Bug: Fixed missing headers

[Corepex]

Followup to: #46

Problem

It seems that the headers dont get passed to the request.

Fix

I created a fix for that but it should be considered as "quick and dirty".
IMHO there is a bigger problem with this part of the code generation. Also the names of the props are weird.

[seriouslag]

How is this a bug? Does this solve an issue with the tests or fix the example?

Or should this change be added to the base request file?

[Corepex]

@seriouslag - yeah this - or something smarter - should be added to the request file ...

It is a bug because "special headers" like Content-Type: application/merge-patch+json don't get passed from the generated service to the request.

In my case (for example) the PATCH method looks like that:

[seriouslag]

I see your case. This library uses the package openapi-typescript-codegen for service generation. The default request file comes from that library. I am all for documenting your use case and fix in this package, but an issue/PR in that library may be better for the ecosystem. This PR changes the example code, not the code the end user will see. I can see how it would be helpful to have different request files in this library for examples of how to use this library.

[7nohe]

As @seriouslag said, the request file is not the responsibility of this library.
However, I think it makes a good example of how to customize headers, so I will accept this PR.