Pin vim-go to latest release

This avoids warnings every time vim starts on older versions of vim

Author: lkorth

vimrc.bundles

@@ -26,7 +26,7 @@ Plug 'derekwyatt/vim-scala'
 Plug 'ekalinin/Dockerfile.vim'
 Plug 'elixir-lang/vim-elixir'
 Plug 'elubow/cql-vim'
-Plug 'fatih/vim-go', { 'do': ':GoInstallBinaries' }
+Plug 'fatih/vim-go', { 'commit': '8c4db1c61432511a3aa55971dabb2171cbcba7b1', 'do': ':GoInstallBinaries' }
 Plug 'Glench/Vim-Jinja2-Syntax'
 Plug 'godlygeek/tabular'
 Plug 'tpope/vim-markdown'