nvim: init: Enable python3 provider

We want to add pandoc support with vim-pandoc next and it makes use of
the python API. So enable this.

nvim/.config/nvim/init.lua

@@ -34,8 +34,8 @@ vim.o.switchbuf          = 'useopen'
 vim.o.encoding           = 'utf-8'
 vim.o.virtualedit        = 'all'
 
+vim.g.python3_host_prog       = '/usr/bin/python3'
 -- Disable providers we do not give a shit about
-vim.g.loaded_python3_provider = 0
 vim.g.loaded_python_provider  = 0
 vim.g.loaded_ruby_provider    = 0
 vim.g.loaded_perl_provider    = 0