fix: convert lib to abstract contract

Author: odyslam

src/StdCheatsJson.sol

@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.6.0 <0.9.0;
+
+import "./Vm.sol";
+
+// Helpers for parsing keys into types.
+abstract contract StdCheatsJson {
+
+    Vm private constant vm = Vm(address(uint160(uint256(keccak256("hevm cheat code")))));
+
+    function parseRaw(string memory json, string memory key)
+        internal
+        returns (bytes memory)
+    {
+        return vm.parseJson(json, key);
+    }
+
+    function readUint(string memory json, string memory key)
+        internal
+        returns (uint256)
+    {
+        return abi.decode(vm.parseJson(json, key), (uint256));
+    }
+
+    function readUintArray(string memory json, string memory key)
+        internal
+        returns (uint256[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (uint256[]));
+    }
+
+    function readInt(string memory json, string memory key)
+        internal
+        returns (int256)
+    {
+        return abi.decode(vm.parseJson(json, key), (int256));
+    }
+
+    function readIntArray(string memory json, string memory key)
+        internal
+        returns (int256[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (int256[]));
+    }
+
+    function readBytes32(string memory json, string memory key)
+        internal
+        returns (bytes32)
+    {
+        return abi.decode(vm.parseJson(json, key), (bytes32));
+    }
+
+    function readBytes32Array(string memory json, string memory key)
+        internal
+        returns (bytes32[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (bytes32[]));
+    }
+
+    function readString(string memory json, string memory key)
+        internal
+        returns (string memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (string));
+    }
+
+    function readStringArray(string memory json, string memory key)
+        internal
+        returns (string[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (string[]));
+    }
+
+    function readAddress(string memory json, string memory key)
+        internal
+        returns (address)
+    {
+        return abi.decode(vm.parseJson(json, key), (address));
+    }
+
+    function readAddressArray(string memory json, string memory key)
+        internal
+        returns (address[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (address[]));
+    }
+
+    function readBool(string memory json, string memory key)
+        internal
+        returns (bool)
+    {
+        return abi.decode(vm.parseJson(json, key), (bool));
+    }
+
+    function readBoolArray(string memory json, string memory key)
+        internal
+        returns (bool[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (bool[]));
+    }
+
+    function readBytes(string memory json, string memory key)
+        internal
+        returns (bytes memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (bytes));
+    }
+
+    function readBytesArray(string memory json, string memory key)
+        internal
+        returns (bytes[] memory)
+    {
+        return abi.decode(vm.parseJson(json, key), (bytes[]));
+    }
+
+
+}

src/StdJson.sol

@@ -4,12 +4,9 @@ pragma solidity >=0.6.0 <0.9.0;
 import "./Vm.sol";
 
 // Helpers for parsing keys into types.
-library StdJson {
+abstract contract StdCheatsJson {
 
-    address constant private VM_ADDRESS =
-        address(bytes20(uint160(uint256(keccak256('hevm cheat code')))));
-
-    Vm internal constant vm = Vm(VM_ADDRESS);
+    Vm private constant vm = Vm(address(uint160(uint256(keccak256("hevm cheat code")))));
 
     function parseRaw(string memory json, string memory key)
         internal