Padé approximants

I am looking for a general package to compute Padé approximants. In my use case these show up as part of the holomorphic load flow method (see Holomorphic Embedding Load-flow method - Wikipedia). An implementation of HELM already exists at AnalyticalLoadFlow.jl (this is just HELM under a different name), which also includes the Padé approximation as part of its implementation. I think it would be worthwhile to setup a dedicated package for Padé approximation, as it is a quite general concept t...