[vim] use auto-pairs instead of delimitMate

DelimitMate with YCM does not work properly, for example <BS> does not
delete the closing parenthesis. See
ycm-core/YouCompleteMe#2696 for more details.

vim/vimrc

@@ -1,6 +1,5 @@
 call plug#begin('~/.vim/bundle')
 
-Plug 'Raimondi/delimitMate'
 Plug 'christoomey/vim-tmux-navigator'
 Plug 'christoomey/vim-tmux-runner'
 Plug 'tpope/vim-commentary'
@@ -34,6 +33,7 @@ Plug 'iamcco/markdown-preview.nvim', { 'do': { -> mkdp#util#install() } } " use
 Plug 'janko-m/vim-test'
 Plug 'sheerun/vim-polyglot'
 Plug 'jpalardy/vim-slime'
+Plug 'jiangmiao/auto-pairs'
 
 call plug#end()