Update Vim bundles

Using my Vim bundle submodule update script:

  ./update-vim-bundles.zsh
Revert "Make `bers` filter out asset at cache clutter"

I didn't really find this to be that useful in the end, and it caused
some unexpected issues, such as when debugging.

This reverts commit 777e465cb3e41815c45533baa172f94c62b64fc6.