Bumping .NET assembly version number before 5.8.1 release as there were changes

Source commit: 25e59b7cfe1dd8e8ec13419b08a790990a709a8c

dotnet/properties/AssemblyInfo.cs

@@ -19,8 +19,8 @@ using System.Runtime.InteropServices;
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("a0b93468-d98a-4845-a234-8076229ad93f")]
 
-[assembly: AssemblyVersion("1.3.0.0")]
-[assembly: AssemblyFileVersion("1.3.0.0")]
+[assembly: AssemblyVersion("1.3.1.0")]
+[assembly: AssemblyFileVersion("1.3.1.0")]
 [assembly: AssemblyInformationalVersionAttribute("5.8.1.0")]
 
 [assembly: CLSCompliant(true)]