U upgrade jdeb plugin from 1.7 to 1.8

Author: fvarrui

src/main/java/io/github/fvarrui/javapackager/maven/GenerateDeb.java

@@ -127,7 +127,7 @@ public File apply(Packager packager) throws Exception {
 				plugin(
 						groupId("org.vafer"), 
 						artifactId("jdeb"), 
-						version("1.7")
+						version("1.8")
 				), 
 				goal("jdeb"), 
 				configuration(