Feature description

Please provide return type hint for the function: init. If the function does not return a value, please provide the type hint as: def function() -> None:

Adding -> None have not sense, since this is a special method and it always returns None. Aslo this creates noise in code and even decreases readability when it's the reason for extra line breaks.

For example, this line fits without annotation and is split into 3 lines with it.

-    def __init__(self, initial_block_size: int = 8, capacity_factor: float = 0.75) -> None:
+    def __init__(
+        self, initial_block_size: int = 8, capacity_factor: float = 0.75
+    ) -> None: