Add peekabo plugin for registers

.vimrc

@@ -17,6 +17,7 @@ call plug#begin('~/.vim/plugged')
 Plug 'preservim/nerdtree'
 Plug 'tpope/vim-fugitive'
 Plug 'tpope/vim-commentary'
+Plug 'junegunn/vim-peekaboo'
 Plug 'itchyny/lightline.vim'
 Plug 'dikiaap/minimalist'
 Plug 'kaicataldo/material.vim'