fix: HttpResponse.rawData accepts only AssocArray

[bchelkowski]

What did you implement:

HttpResponse has now a raw field alongside rawData, which is an Associative Array with a data field that could have any type now.

Fixes:

https://github.com/getndazn/kopytko-framework/issues/53

Todos:

• [x] Write documentation (if required)
• [x] Fix linting errors
• [x] Enable "Allow edits from maintainers" for this PR
• [x] Update the messages below

Is this ready for review?: YES Is it a breaking change?: NO

[github-actions[bot]]

:tada: This PR is included in version 2.1.2 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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