Holyshit

* Context managers!
* Better session checks
See the discord bot example for how to use context managers

* Fix close conditional always returning True (unintentional hasattr check) so to check if the HTTP session is already closed

* Fix fatal linter error that rendered exceptions unusable

**Full Changelog**: https://github.com/cobaltgit/holyshit/compare/1.0.3...1.1.1

Move pre-commit to dev dependencies, as intended. Silly me.

Only close the aiohttp session IF it was created by the classmethod (boolean flag ensures this)

Initial Release

The title says it all, this release adds the core features needed for this wrapper.
The next thing I'll focus on is implementing context managers (`async with` statement)