Get version information from jar manifest

See https://github.com/remkop/picocli/issues/1663

Change-Id: I9c35e336dd06956967d3a07318c1f397b8518091
diff --git a/pom.xml b/pom.xml
index 256bef1..21fae85 100644
--- a/pom.xml
+++ b/pom.xml
@@ -173,6 +173,7 @@
                             <addClasspath>true</addClasspath>
                             <classpathPrefix>lib/</classpathPrefix>
                             <mainClass>de.ids_mannheim.korap.tokenizer.Main</mainClass>
+                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                         </manifest>
                     </archive>
                 </configuration>
@@ -204,6 +205,7 @@
                     <archive>
                         <manifest>
                             <mainClass>de.ids_mannheim.korap.tokenizer.Main</mainClass>
+                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                         </manifest>
                     </archive>
                 </configuration>