Fix travis-ci build

.travis.yml

@@ -2,12 +2,14 @@ language: vim
 
 before_script: |
   git clone https://github.com/junegunn/vader.vim.git
+  git clone https://github.com/tpope/vim-repeat
 
 script: |
   vim -Nu <(cat << VIMRC
   filetype off
   set rtp+=vader.vim
+  set rtp+=vim-repeat
   set rtp+=.
-  set rtp+=after
   filetype plugin indent on
+  syntax enable
   VIMRC) -c 'Vader! test/*' > /dev/null