nvim: Switch Navigator plugin to use wezterm

Using wezterm in current implementation of Navigator.nvim plugin -
somewhat of a HACK until the final implementation exists in the plugin.

nvim/.config/nvim/lua/plugins.lua

@@ -22,7 +22,7 @@ require("packer").startup(function()
     -- essential
     use {
         'numToStr/Navigator.nvim',
-        config = function() require('Navigator').setup() end
+        config = function() require('Navigator').setup({ mux = "wezterm" }) end
     } -- allow seamless navigation between vim buffers and tmux splits
     use 'jeffkreeftmeijer/vim-numbertoggle' -- toggles numbers to absolute for all buffers but the current which is relative
     use 'RRethy/vim-illuminate' -- highlight other occurences of the word under cursor