Release v0.2.0 · py-mine/mcproto

#14: Add __slots__ to most classes in the project
- All connection classes are now slotted
- Classes in mcproto.utils.abc are now slotted
Separate packet interaction functions into mcproto.packets.interactions, (though they're reexported in
mcproto.packets, so no breaking changes)

#14: Add missing __slots__ to ServerBoundPacket and ClientBoundPacket subclasses, which inherited from slotted
Packet, but didn't themselves define __slots__, causing __dict__ to be needlessly created.
The error message produced by RequiredParamsABCMixin class when a required no MRO class variable isn't present now
includes a previously missing space, making it more readable.

#6: Rework deprecation system
- Drop support for date-based deprecations, versions work better
- Provide deprecation_warn function, which emits warnings directly, no need for a decorator
- Add a SemanticVersion class, supporting version comparisons
- If the project's version is already higher than the specified deprecation removal version, raise a DeprecationWarning
  as a full exception (rather than just a warning).
#7: Add towncrier for managing changelog
#14: Add slotscheck, ensuring __slots__ are defined properly everywhere.
#14: Make typing-extensions a runtime dependency and use it directly, don't rely on if typing.TYPE_CHECKING blocks.
#15: Add codespell tool, to automatically find spelling mistakes.
Add README file into the tests/ folder, explaining how we use unit-tests and some basics of testing.
Add CustomMockMixin internal class, inheriting from UnpropagatingMockMixin, but also allowing to use spec_set as
class variable, as it will automatically pass it into __init__ of the mock class.
Add several new flake8 extensions, and rework flake8 config file
Add support for specifying what child mock type to propagate in UnpropagatingMockMixin class (for unit-tests).

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