Bump Plexus Archiver version to 4.0.0

Plexus Archiver 3.7.0 introduced new methods to interfaces.
As those are backward incompatible changes
bump the major version to reflect that.

Closes #107

Author: plamentotev

pom.xml

@@ -10,7 +10,7 @@
   </parent>
 
   <artifactId>plexus-archiver</artifactId>
-  <version>3.7.1-SNAPSHOT</version>
+  <version>4.0.0-SNAPSHOT</version>
   <name>Plexus Archiver Component</name>
 
   <scm>