Add lua support

autoload/SpaceVim/layers/lang/lua.vim

@@ -0,0 +1,16 @@
+"WolfgangMehner/lua-support
+"http://lua-users.org/wiki/LuaEditorSupport
+"
+function! SpaceVim#layers#lang#lua#plugins() abort
+    let plugins = []
+    " Lua reference manual, wsdjeg's fork
+    call add(plugins, ['wsdjeg/luarefvim'])
+    " Improved Lua 5.3 syntax and indentation support for Vim
+    call add(plugins, ['tbastos/vim-lua', {'on_ft' : 'lua'}])
+    call add(plugins, ['WolfgangMehner/lua-support', {'on_ft' : 'lua'}])
+    return plugins
+endfunction
+
+function! SpaceVim#layers#lang#lua#config() abort
+    
+endfunction