dante no longer supports v1 commands

[Ptival]

Since cabal 3.0, cabal repl points to cabal v2-repl as opposed to cabal v1-repl.

The methods alist is thus obsolete, since it uses cabal new-repl and cabal repl which, currently, do the same thing, and in the future, may move again.

It seems the alist should be updated to use instead the more explicit v1 and v2 flags so as to solve the current issue and avoid such issues in the future.

[jyp]

Thanks!