`isRegularSequence` from `Depth` package does not work in multigraded setting

[tom111]

The problem is in the title. Here is an example:

R = QQ[x,y, Degrees=>{{1,0},{0,1}}]
isRegularSequence {x,y}

yields false.

After a brief look at the code. It is doing something with Hilbert functions that assumes a standard graded ring.