Move merkletree to dev dependency (#439)

Author: nachoiacovino

package.json

@@ -76,6 +76,7 @@
     "ts-node": "^10.7.0",
     "tsup": "^6.0.1",
     "typechain": "^8.0.0",
+    "merkletreejs": "^0.2.24",
     "typescript": "^4.6.2"
   },
   "peerDependencies": {
@@ -89,7 +90,6 @@
     "eventemitter3": "^4.0.7",
     "fast-deep-equal": "^3.1.3",
     "form-data": "^4.0.0",
-    "merkletreejs": "^0.2.24",
     "multihashes": "^4.0.3",
     "tiny-invariant": "^1.2.0",
     "uuid": "^8.3.2",