vim-plugins: add jedi-vim

As this is a python3 plugin it'd be nice to check for python3 support in
the used vim, but apparently nobody else does this.

pkgs/misc/vim-plugins/vim-plugin-names

@@ -37,14 +37,15 @@ ctjhoa/spacevim
 ctrlpvim/ctrlp.vim
 dag/vim2hs
 dannyob/quickfixstatus
+davidhalter/jedi-vim
 derekelkins/agda-vim
 derekwyatt/vim-scala
 dhruvasagar/vim-table-mode
 digitaltoad/vim-jade
 dleonard0/pony-vim-syntax
 dracula/vim
-dylanaraps/wal.vim
 drmingdrmer/xptemplate
+dylanaraps/wal.vim
 eagletmt/ghcmod-vim
 eagletmt/neco-ghc
 easymotion/vim-easymotion