add: luat_libs.h添加luaopen_ws2812声明

luat/include/luat_libs.h

@@ -160,4 +160,6 @@ LUAMOD_API int luaopen_ercoap( lua_State *L );
 
 LUAMOD_API int luaopen_sqlite3( lua_State *L );
 
+LUAMOD_API int luaopen_ws2812( lua_State *L );
+
 #endif