Bump the version

Source/Managed/ENet.cs

@@ -901,7 +901,7 @@ namespace ENet {
 		public const uint timeoutLimit = 32;
 		public const uint timeoutMinimum = 5000;
 		public const uint timeoutMaximum = 30000;
-		public const uint version = (2 << 16) | (3 << 8) | (7);
+		public const uint version = (2 << 16) | (3 << 8) | (8);
 
 		public static bool Initialize() {
 			return Native.enet_initialize() == 0;