Humbug

Added support to Humbug Python for [PEP 561](https://www.python.org/dev/peps/pep-0561/). Without this, mypy doesn't like humbug imports.

Adds support for reporting feature engagement.

Also adds function/method decorators which allow you to capture when a function in your code base is called and when it raises an exception.

Gives users the ability to set tags on `HumbugReporter` instances which are published with every report sent by that reporter.

Adds error information as tags to error reports.

Backwards compatible version of Humbug Python with only `requests` as a dependency.

Removed all requirements except request.

Simplified interface so that no journal ID is needed.

All calls are made to the new `https://spire.bugout.dev/humbug/reports` endpoint.