Move types to a different contract

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polytope-labs/solidity-merkle-trees",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "The most advanced solidity library for merkle (multi) proof verification of different kinds of merkle trees",
   "author": "Polytope Labs <hello@polytope.technology>",
   "license": "Apache-2.0",

src/MerkleMountainRange.sol

@@ -1,23 +1,9 @@
 // SPDX-License-Identifier: Apache2
 pragma solidity 0.8.17;
 
-import "./MerkleMultiProof.sol";
 import "openzeppelin/utils/math/Math.sol";
-
-/// @title A representation of a MerkleMountainRange leaf
-struct MmrLeaf {
-    // the leftmost index of a node
-    uint256 k_index;
-    // The position in the tree
-    uint256 leaf_index;
-    // The hash of the position in the tree
-    bytes32 hash;
-}
-
-struct Iterator {
-    uint256 offset;
-    bytes32[] data;
-}
+import "./MerkleMultiProof.sol";
+import "./Types.sol";
 
 /**
  * @title A Merkle Mountain Range proof library

src/MerkleMultiProof.sol

@@ -2,14 +2,7 @@
 pragma solidity 0.8.17;
 
 import "openzeppelin/utils/math/Math.sol";
-
-/// @title A representation of a Merkle tree node
-struct Node {
-    // Distance of the node to the leftmost node
-    uint256 k_index;
-    // A hash of the node itself
-    bytes32 node;
-}
+import "./Types.sol";
 
 /**
  * @title A Merkle Multi proof library

src/MerklePatricia.sol

@@ -8,17 +8,10 @@ import "./trie/TrieDB.sol";
 
 import "./trie/substrate/SubstrateTrieDB.sol";
 import "./trie/ethereum/EthereumTrieDB.sol";
+import "./Types.sol";
 
 // SPDX-License-Identifier: Apache2
 
-// Outcome of a successfully verified merkle-patricia proof
-struct StorageValue {
-    // the storage key
-    bytes key;
-    // the encoded value
-    bytes value;
-}
-
 /**
  * @title A Merkle Patricia library
  * @author Polytope Labs

src/Types.sol

@@ -0,0 +1,35 @@
+pragma solidity 0.8.17;
+
+// SPDX-License-Identifier: Apache2
+
+// Outcome of a successfully verified merkle-patricia proof
+struct StorageValue {
+    // the storage key
+    bytes key;
+    // the encoded value
+    bytes value;
+}
+
+/// @title A representation of a Merkle tree node
+struct Node {
+    // Distance of the node to the leftmost node
+    uint256 k_index;
+    // A hash of the node itself
+    bytes32 node;
+}
+
+
+/// @title A representation of a MerkleMountainRange leaf
+struct MmrLeaf {
+    // the leftmost index of a node
+    uint256 k_index;
+    // The position in the tree
+    uint256 leaf_index;
+    // The hash of the position in the tree
+    bytes32 hash;
+}
+
+struct Iterator {
+    uint256 offset;
+    bytes32[] data;
+}