Putting autocomands in a group (#59)

* Warp autocmd with augroup

lua/lualine.lua

@@ -109,9 +109,12 @@ end
 local function exec_autocommands()
   _G.set_lualine_theme = set_lualine_theme
   _G.set_active_statusline = statusline
+  vim.cmd([[augroup lualine]])
+  vim.cmd([[autocmd!]])
   vim.cmd([[autocmd WinEnter,BufEnter * setlocal statusline=%!v:lua.set_active_statusline(1)]])
   vim.cmd([[autocmd WinLeave,BufLeave * lua require('lualine').set_inactive_statusline()]])
   vim.cmd([[autocmd ColorScheme * call v:lua.set_lualine_theme()]])
+  vim.cmd([[augroup END]])
 end
 
 function M.status()