Release v0.2.0

This release adds the following features:

• Group (and sub group) command support.
• Commands to be loaded from external files via bot.register_command.
• Customisability on installation contexts (Command(integration_types=...)).
• Customisability on allowed interaction contexts (Command(allowed_contexts=...)).
• User & Message commands (Command(command_type=...).

This release also:

• Improves overall library type-hint coverage.
• Adds an isort config file (.cfg.isort).
• Fixes a typo (Interaction.defered -> Interaction.deferred).
• Hopefully fixes the dependancies being resolved on pypi.

Available on PyPi now: https://pypi.org/project/httpcord/0.2.0/
pip install --update httpcord