feat(vm): rememberKeys (#622)

* feat(vm): rememberKeys

* Merge branch 'master' into yash/remember-keys

Author: yash-atreya

src/Vm.sol

@@ -13,6 +13,6 @@ contract VmTest is Test {
     }
 
     function test_VmSafeInterfaceId() public pure {
-        assertEq(type(VmSafe).interfaceId, bytes4(0x04f0cf87), "VmSafe");
+        assertEq(type(VmSafe).interfaceId, bytes4(0x6beed0a1), "VmSafe");
     }
 }