Update docs

contracts/mocks/DoubleEndedQueueMock.sol

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+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import "../utils/structs/DoubleEndedQueue.sol";
+
+// Bytes32Deque
+contract Bytes32DequeMock {
+    using DoubleEndedQueue for DoubleEndedQueue.Bytes32Deque;
+
+    event OperationResult(bytes32 value);
+
+    DoubleEndedQueue.Bytes32Deque private _vector;
+
+    function pushBack(bytes32 value) public {
+        _vector.pushBack(value);
+    }
+
+    function pushFront(bytes32 value) public {
+        _vector.pushFront(value);
+    }
+
+    function popFront() public returns (bytes32) {
+        bytes32 value = _vector.popFront();
+        emit OperationResult(value);
+        return value;
+    }
+
+    function popBack() public returns (bytes32) {
+        bytes32 value = _vector.popBack();
+        emit OperationResult(value);
+        return value;
+    }
+
+    function front() public view returns (bytes32) {
+        return _vector.front();
+    }
+
+    function back() public view returns (bytes32) {
+        return _vector.back();
+    }
+
+    function at(uint256 i) public view returns (bytes32) {
+        return _vector.at(i);
+    }
+
+    function clear() public {
+        _vector.clear();
+    }
+
+    function length() public view returns (uint256) {
+        return _vector.length();
+    }
+
+    function empty() public view returns (bool) {
+        return _vector.empty();
+    }
+}