Merge pull request #19 from ProjectOpenSea/ryan/add-virtual-to-mintRedemption

add `virtual` to `mintRedemption`

Author: ryanio

src/extensions/ERC1155ShipyardRedeemableMintable.sol

@@ -27,7 +27,7 @@ contract ERC1155ShipyardRedeemableMintable is ERC1155ShipyardRedeemable, IRedemp
         OfferItem calldata, /* offer */
         ConsiderationItem[] calldata, /* consideration */
         TraitRedemption[] calldata /* traitRedemptions */
-    ) external {
+    ) external virtual {
         // Require that msg.sender is valid.
         _requireValidRedeemablesCaller();
 

src/extensions/ERC721ShipyardRedeemableMintable.sol

@@ -27,7 +27,7 @@ contract ERC721ShipyardRedeemableMintable is ERC721ShipyardRedeemable, IRedempti
         OfferItem calldata, /* offer */
         ConsiderationItem[] calldata, /* consideration */
         TraitRedemption[] calldata /* traitRedemptions */
-    ) external {
+    ) external virtual {
         // Require that msg.sender is valid.
         _requireValidRedeemablesCaller();