refactor(proof): add MerkleProof type to exports

re #337

Author: cedoor

packages/proof/src/index.ts

@@ -1,6 +1,7 @@
+import calculateNullifierHash from "./calculateNullifierHash"
 import generateProof from "./generateProof"
 import verifyProof from "./verifyProof"
-import calculateNullifierHash from "./calculateNullifierHash"
 
-export { generateProof, verifyProof, calculateNullifierHash }
+export { MerkleProof } from "@zk-kit/incremental-merkle-tree"
 export * from "./types"
+export { generateProof, verifyProof, calculateNullifierHash }