Update assembly version to 0.1.7.4

PixiEditor/Properties/AssemblyInfo.cs

@@ -50,5 +50,5 @@ using System.Windows;
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.1.7.3")]
-[assembly: AssemblyFileVersion("0.1.7.3")]
+[assembly: AssemblyVersion("0.1.7.4")]
+[assembly: AssemblyFileVersion("0.1.7.4")]