upgrade opensea-js

Author: alexanderatallah

package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "@0x/subproviders": "^2.1.4",
     "multi-token-standard": "github:ProjectOpenSea/multi-token-standard",
-    "opensea-js": "^1.1.5",
+    "opensea-js": "^2.0.1",
     "openzeppelin-solidity": "^2.1.3",
     "truffle": "^5.1.12",
     "truffle-assertions": "^0.9.2",