Update build to use Tycho 0.23

see https://wiki.eclipse.org/Tycho/Release_Notes/0.23

Change-Id: I70e6711294e2a92efa77fd9dd1c906c449c9b4db
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.packaging/pom.xml

@@ -59,7 +59,7 @@
   <name>JGit Tycho Parent</name>
 
   <properties>
-    <tycho-version>0.22.0</tycho-version>
+    <tycho-version>0.23.0</tycho-version>
     <tycho-extras-version>${tycho-version}</tycho-extras-version>
   </properties>
 

pom.xml

@@ -207,7 +207,7 @@
     <slf4j-version>1.7.2</slf4j-version>
     <log4j-version>1.2.15</log4j-version>
     <maven-javadoc-plugin-version>2.10.1</maven-javadoc-plugin-version>
-    <tycho-extras-version>0.22.0</tycho-extras-version>
+    <tycho-extras-version>0.23.0</tycho-extras-version>
 
     <!-- Properties to enable jacoco code coverage analysis -->
     <sonar.core.codeCoveragePlugin>jacoco</sonar.core.codeCoveragePlugin>