13 bits for item product_ids is not enough any more

[bensamuel-k]

In line 21 of RandomBMPreset/BMLoadout.cpp you reserve 13 bits for the item product-ids:
writer.WriteBits(opt.second.product_id, 13); //Item id, 13 bits so upto 8191 should be enough.
But I noticed there are some items with a product-id higher than 8191 now. I tested with the decal: "Fennec: Karmine Corp (Home) (2)", which has a product-id of 8371. I tried manually adding this decal to a loadout and when I loaded the resulting Hex-Code into Rocket League, no decal was added. So some newer items are not included in the randomizer.