added crop information to farming.registered_plants table

crops/hemp.lua

@@ -249,3 +249,12 @@ crop_def.drop = {
 	}
 }
 minetest.register_node("farming:hemp_8", table.copy(crop_def))
+
+-- add to registered_plants
+farming.registered_plants["farming:hemp"] = {
+	crop = "farming:hemp",
+	seed = "farming:seed_hemp",
+	minlight = 13,
+	maxlight = 15,
+	steps = 8
+}