Refresh README and force engine version >= 5.4.0

3d_armor/init.lua

@@ -1,3 +1,7 @@
+if not core.features.use_texture_alpha_string_modes then
+	error("3d_armor requires Luanti/Minetest 5.4.0 or newer. Please update.")
+end
+
 local modname = minetest.get_current_modname()
 local modpath = minetest.get_modpath(modname)
 local worldpath = minetest.get_worldpath()

3d_armor/mod.conf

@@ -2,4 +2,4 @@ name = 3d_armor
 depends = default, player_api
 optional_depends = player_monoids, armor_monoid, pova, moreores
 description = Adds craftable armor that is visible to other players.
-min_minetest_version = 5.0
+min_minetest_version = 5.4