bump JS version

Author: samuelvanderwaal

token-metadata/js/idl/mpl_token_metadata.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.8.0",
+  "version": "1.8.1",
   "name": "mpl_token_metadata",
   "instructions": [
     {

token-metadata/js/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@metaplex-foundation/mpl-token-metadata",
-  "version": "2.8.0",
-  "contractVersion": "1.8.0",
+  "version": "2.8.1",
+  "contractVersion": "1.8.1",
   "description": "MPL Token Metadata JavaScript API.",
   "main": "dist/src/mpl-token-metadata.js",
   "types": "dist/src/mpl-token-metadata.d.ts",