Refactoring Python codebase

[ldynia]

Changes

This PR carries the following updates regarding Python library implementation:

• Major refactoring
• Update to documentation
• Library update to 1.1.0
• Making library encoding agnostic

Motivation

Standard webhook specification states that:

The payload should be JSON formatted for maximum compatibility, but other content types can be used as well.

The current Python implementation doesn't support the aforementioned statement and exhibits external coupling - two modules share an externally imposed data format.

The significant change is getting rid of returned JSON-encoded payload -- hence removing external coupling

Removing:

return json.loads(payload)

Adding:

return payload

All unit tests pass.

P.S

Now, the meaning of the word standard makes sense. Otherwise, this library should be renamed to webhookJSONstandard

Live long and pull request!