gavinsimpson/permute: permute 0.9-7 released

Version 0.9-7 of permute is now on CRAN. This version fixed an error caught in r-devel (to be 4.2 I think).

• The documented behaviour of shuffleFree() allowed shuffleFree(x = 1:10), with x passed immediately to sample.int(), which is incorrect and raises an error in the development version of R (at the time of writing). Reported by Brian Ripley.

I had previously drafted version 0.9-6 for release but for some reason it never got released. That version fixed a bug in allPerms()

• allPerms() was calling allSeries() with the incorrect number of permutations, leading to problems with shuffleSet() also. #28 reported by Cajo ter Braak

This fix is contained with 0.9-7.