fix: update forge-std (#214)

* chore!: update forge-std to v1.7.1

This is a breaking change because v.1.7.0 introduced a breaking change.

Details here foundry-rs/forge-std#458

* chore: remove ad-hoc SerializeJson interface

* chore: update functions mutability

src/_modules/Commands.sol

@@ -173,7 +173,7 @@ library commands {
         try vulcan.hevm.tryFfi(inputs) returns (VmSafe.FfiResult memory ffiResult) {
             CommandOutput memory output;
 
-            output.exitCode = ffiResult.exit_code;
+            output.exitCode = ffiResult.exitCode;
             output.stdout = ffiResult.stdout;
             output.stderr = ffiResult.stderr;
             output.command = Command(inputs);

src/_modules/Json.sol

@@ -7,12 +7,6 @@ import {LibError, Error} from "./Error.sol";
 import "./Accounts.sol";
 import "./Vulcan.sol";
 
-/// Hacky interface to use the `serializeJson` vm cheatcode
-/// TODO: remove
-interface SerializeJson {
-    function serializeJson(string memory, string memory) external returns (string memory);
-}
-
 struct JsonObject {
     string id;
     string serialized;
@@ -235,11 +229,11 @@ library json {
         return vulcan.hevm.parseJsonBytes32Array(obj.serialized, key);
     }
 
-    function getKeys(JsonObject memory obj, string memory key) internal returns (string[] memory) {
+    function getKeys(JsonObject memory obj, string memory key) internal pure returns (string[] memory) {
         return vulcan.hevm.parseJsonKeys(obj.serialized, key);
     }
 
-    function getKeys(JsonObject memory obj) internal returns (string[] memory) {
+    function getKeys(JsonObject memory obj) internal pure returns (string[] memory) {
         return getKeys(obj, "");
     }
 
@@ -257,10 +251,8 @@ library json {
             return JsonError.Invalid().toJsonResult();
         }
 
-        // TODO: remove hack to use the unreleased `serializeJson` Vm cheatcode
-        SerializeJson vm = SerializeJson(address(vulcan.hevm));
         JsonObject memory jsonObj = create();
-        jsonObj.serialized = vm.serializeJson(jsonObj.id, obj);
+        jsonObj.serialized = vulcan.hevm.serializeJson(jsonObj.id, obj);
 
         return Ok(jsonObj);
     }

src/_modules/Request.sol

@@ -265,7 +265,7 @@ library LibRequestClient {
         );
     }
 
-    function toCommand(RequestClient memory self, Request memory req) internal returns (Command memory) {
+    function toCommand(RequestClient memory self, Request memory req) internal pure returns (Command memory) {
         string memory curlWriteOutTemplate = "\"\\n%{header_json}\\n\\n%{http_code}\" ";
 
         if (self._curlVersion.lessThan(semver.create(7, 83))) {
@@ -562,7 +562,7 @@ library LibHeaders {
         return values.getStringArray(string.concat(".", key));
     }
 
-    function getKeys(Headers self) internal returns (string[] memory) {
+    function getKeys(Headers self) internal pure returns (string[] memory) {
         (JsonObject memory values,) = decode(self);
         return values.getKeys();
     }