add minimum minetest version key for contentdb

2020-06-03 13:00:22 -04:00 · 2020-06-03 13:00:22 -04:00 · 31a938693a
--- a/mod.conf
+++ b/mod.conf
@ -1 +1,2 @@
 name = led_marquee
+min_minetest_version = 5.2.0