Update SharpPcap assembly version from 4.1.0 to 4.2.0

Author: chmorgan

SharpPcap/AssemblyInfo.cs

@@ -25,7 +25,7 @@
 // You can specify all the values or you can default the Revision and Build Numbers 
 // by using the '*' as shown below:
 
-[assembly: AssemblyVersion("4.1.0")]
+[assembly: AssemblyVersion("4.2.0")]
 
 //
 // In order to sign your assembly you must specify a key to use. Refer to the