vint from master branch

Author: blueyed

.travis.yml

@@ -16,7 +16,7 @@ install:
   - |
     if [ "$VIM_VERSION" = 'installed' ]; then
       pip install --user flake8
-      pip install --user --pre vim-vint
+      pip install --user git+https://github.com/Kuniwak/vint
     else
       bash scripts/install-vim.sh
       export PATH=$HOME/vim/bin:$PATH