Remove dependency on now experimental feature "switch

Been marked as experimental since 5.18 sometime - and there is no point using it anymore.
Update changes to show that we no longer use feature switch

This was causing issue #10 in combination with the minimum year setting. Output from dzil build was

``Module feature v1.130.0 is only found in core Perl; adding Perl v5.10.1 requirement``
Bump version number