Resolve issues with using 0 or 100 on mount and remove `didSyncBounds` logic

[nerdyman]

There are edge cases where the position is not respected on mount when it is either 0 or 100 https://github.com/nerdyman/react-compare-slider/issues/37

This was resolved by adding the didSyncBounds logic it should be possible to achieve this without any additional logic.

Possible solution might be #80