Dependency injection for logger

[yashpatel6]

    Disabling the warning works, but it may be a code smell. Have you considered refactoring `__init__` to use dependency injection for the logger?

Originally posted by @dan-knight in #27 (comment)

[dan-knight]

This will mean that the private _logger attribute won't be accessed directly, so the pylint warnings will go away. If we make this change, be sure to also remove the relevant pylint: disable comments from unit tests.