Add further interpolations kinds to interp1d_unc to match scipy

[mgrub]

Is your feature request related to a problem? Please describe.
Make PyDynamic.uncertainty.interpolate.interp1d_unc allow also for the additional interpolation modes 0,1,2,3,"slinear", "quadratic" from scipy.interpolate.interp1d.

Describe the solution you'd like
This should be a straight forward process by generalizing the already existing cubic-spline implementation. The extrapolation-continuity problem should also be handled, as described in #210 .