Maximum between TimeSeries

[avilchess]

Is your feature request related to a problem? Please describe.
Khiva already contains a function that computes the maximum point within a time series.
However, khiva is missing a function that computes the maximum between several time series. It is getting the maximum element across all time series for each dimension.

t1 -> [0,1,2,3]
t2 -> [1,0,4,1]
t3 -> [2,0,1,4]
Res -> [2,1,4,4]