compile nuspacker using java 8

this should fix the tmd generation

TeconMoon's WiiVC Injector/Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // 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("3.0.15.0")]
-[assembly: AssemblyFileVersion("3.0.15.0")]
+[assembly: AssemblyVersion("3.0.16.1")]
+[assembly: AssemblyFileVersion("3.0.16.1")]