pmlmodelling/nctoolkit: v0.5.0

This release enhances a couple of methods.

The subset method now lets users subset vertical levels using levels or depths. This requires a two element list, and the subsetting will give you the levels between the two given. So, ds.subset(levels = [0, 100]) would give you the top 100 metres in an oceanic dataset.

The match_points method now allows extrapolation to vertical depths, with the maximum distance extrapolated given by the max_extrap argument.