fix type conversion

Author: SimonCropp

src/DiffEngine/ProcessCleanup.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Management;
 using System.Runtime.InteropServices;
@@ -86,7 +87,7 @@ from Win32_Process
             foreach (var process in collection)
             {
                 var command = (string) process["CommandLine"];
-                var id = (int) process["ProcessId"];
+                var id = (int) Convert.ChangeType(process["ProcessId"], typeof(int));
                 process.Dispose();
                 yield return new ProcessCommand(command, id);
             }

src/Directory.Build.props

@@ -2,7 +2,7 @@
 <Project>
   <PropertyGroup>
     <NoWarn>CS1591;CS0649</NoWarn>
-    <Version>2.0.3</Version>
+    <Version>2.0.4</Version>
     <AssemblyVersion>1.0.0.0</AssemblyVersion>
     <PackageTags>Json, Testing, Verify, Snapshot, Approvals</PackageTags>
     <Description>Enables simple verification of complex models and documents.</Description>