Adding system_info('world_min_spawning_light') (#1475)

docs/scarpet/api/Auxiliary.md

@@ -753,7 +753,8 @@ system calls. In all circumstances, these are only provided as read-only.
   * `world_center` - Returns coordinates of the center of the world with respect of the world border
   * `world_size` - Returns radius of world border for current dimension.
   * `world_max_size` - Returns maximum possible radius of world border for current dimension.
-  * 
+  * `world_min_spawning_light` - Returns minimum light level at which mobs can spawn for current dimension, taking into account datapacks
+
 ##### Relevant gameplay related properties
   * `game_difficulty` - current difficulty of the game: `'peaceful'`, `'easy'`, `'normal'`, or `'hard'`
   * `game_hardcore` - boolean whether the game is in hardcore mode