5.3.38 will feature a mod.json file you should fill out when making mods. This will help the game notify players if mods are outdated, and in the future will be able to help warn players about dependencies.

Here is an example file.

{
	"modname": "Test Mod 2",
	"moddesc": "A test mod that should be compatible",
	"author": "Ada18980",
	"modbuild": 1,
	"gamemajor": 5,
	"gameminor": 3,
	"gamepatch_min": 38,
	"gamepatch_max": -1,
	"priority": 0
}

Note: setting one of the game version fields to -1 makes it ignore the field when determining datedness.