lazy val logger field should be transient (#114)

Author: Atry

src/main/scala/com/typesafe/scalalogging/Logging.scala

@@ -24,6 +24,7 @@ import org.slf4j.LoggerFactory
  */
 trait LazyLogging {
 
+  @transient
   protected lazy val logger: Logger =
     Logger(LoggerFactory.getLogger(getClass.getName))
 }