perlPackages.PackageStash: Revert "update from 0.34 to 0.36"

This reverts commit 5adbf4d447a4dd1229eaeb0627834e5e444d7083. The update broke
the test suite of perl-Moose [1], which is required by Hydra.

[1] http://hydra.nixos.org/build/10268974