add minetest 5.4 support (#15)

* add minetest 5.4 support

* handle player model in 5.4 better

Author: wsor4035

init.lua

@@ -27,7 +27,8 @@ i3 = {
 		debug_mode = false,
 		max_favs = 6,
 		max_waypoints = 30,
-		min_fs_version = 6,
+		min_fs_version = 4,
+		target_fs_version = 6,
 		item_btn_size = 1.1,
 		drop_bag_on_die = true,
 		wielditem_fade_after = 3,

mod.conf

@@ -1,4 +1,4 @@
 name = i3
 description = Next-generation inventory
 optional_depends = 3d_armor, skinsdb, awards
-min_minetest_version = 5.6
+min_minetest_version = 5.4

src/gui.lua

@@ -1751,7 +1751,7 @@ local function make_fs(player, data)
 	local full_height = 12
 
 	fs("formspec_version[%u]size[%f,%f]no_prepend[]bgcolor[#0000]",
-		i3.settings.min_fs_version, data.inv_width + 8, full_height)
+		i3.settings.target_fs_version, data.inv_width + 8, full_height)
 
 	fs(styles)