Transform function for TimeSeries

[Kostiiii]

Describe proposed solution
New function in TimeSeries class named transform taking as parameter function and applying it to TimeSeries itself. For reference see pandas-pipe

signature:
transform(self, function, *args, **kwargs) -> TimeSeries

[pennfranc]

If I'm not mistaken, this would basically extend #121 to incorporate args and kwargs, right?

[Kostiiii]

There are some differences, main one is that function should be TimeSeries -> TimeSeries and not float -> float.

[hrzn]

Closing, as it will be part of the next release.