Replace type hint numbers.Number with float

[gruebel]

🚀 Feature

Due to limitations in mypy or to be precise in typeshed, int and float are no numbers.Number. (For some extra details #1391 (comment))

Therefore it would be helpful to change the typing from number.Number to float and remove several # type: ignore, where applicable.

[gruebel]

@vfdev-5 you can directly assign me 😄 I want to see, if it is that easy, how I imagined it or if we get new problems with it.

[vfdev-5]

@gruebel sure! Thanks for opening the issue !