Bump to 1.4.0.

Author: PhyxionNL

PacketDotNet.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata>
     <id>PacketDotNet</id>
-    <version>1.3.0</version>
+    <version>1.4.0</version>
     <authors>Chris Morgan</authors>
     <owners>chmorgan</owners>
     <licenseUrl>https://www.mozilla.org/en-US/MPL/2.0/</licenseUrl>