df_caverns should depend on "oil" and "mine_gas"

[SmallJoker]

2022-10-26 09:23:17: ERROR[Main]: ModError: Failed to load and run script from XX/mods/dfcaverns/df_caverns/init.lua:
2022-10-26 09:23:17: ERROR[Main]: Unknown node: oil:oil_source
2022-10-26 09:23:17: ERROR[Main]: stack traceback:
2022-10-26 09:23:17: ERROR[Main]: 	[C]: in function '__index'
2022-10-26 09:23:17: ERROR[Main]: 	XX/builtin/common/item_s.lua:201: in function 'get_content_id'

2022-10-26 09:24:59: ERROR[Main]: ModError: Failed to load and run script from XX/mods/dfcaverns/df_caverns/init.lua:
2022-10-26 09:24:59: ERROR[Main]: Unknown node: mine_gas:gas
2022-10-26 09:24:59: ERROR[Main]: stack traceback:
2022-10-26 09:24:59: ERROR[Main]: 	[C]: in function '__index'
2022-10-26 09:24:59: ERROR[Main]: 	XX/builtin/common/item_s.lua:201: in function 'get_content_id'