Limits of `Polynomials.PolyCompat`?

In the past (i.e., some months ago), functions `polyfit`, `polyval`, etc. worked. I have the impression that `polyfit` has been replaced by `fit`, and that `polyval` has been eliminated.

I have tried to use commands:
```julia
using Polynomials
Polynomials.PolyCompat
```
in the hope that this would make my old code work, but I get error messages.

*Should* this work?