Bump the version

Source/Managed/ENet.cs

@@ -941,7 +941,7 @@ namespace ENet {
 		public const uint timeoutLimit = 32;
 		public const uint timeoutMinimum = 5000;
 		public const uint timeoutMaximum = 30000;
-		public const uint version = (2 << 16) | (4 << 8) | (4);
+		public const uint version = (2 << 16) | (4 << 8) | (5);
 
 		public static uint Time {
 			get {
@@ -1189,4 +1189,4 @@ namespace ENet {
 		[DllImport(nativeLibrary, CallingConvention = CallingConvention.Cdecl)]
 		internal static extern void enet_peer_reset(IntPtr peer);
 	}
-}
+}