Iocursor

Added
- Wheels for Windows platform.

Added
- Wheels for Python 3.11.

Fixed
- `void*` pointers preventing build on Windows ([1](https://github.com/althonos/iocursor/issues/1)).
- Missing terminator in `Cursor.__exit__` keyword argument list causing issues on Windows.

Added
- Wheels for Python 3.10.

Fixed
- Broken docstrings for `Cursor.write`, `Cursor.tell` and `Cursor.readlines`.

Added
- Missing documentation for `Cursor` methods.
- Contribution guidelines in `CONTRIBUTING.md` file.

Fixed
- Wheels not being built for Python 3.9.

Initial release.