Update tycho version to 0.26

Change-Id: I1cf3402c057de89d1afe161d2d4106896fa8753f
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>0.25.0</tycho-version>
+    <tycho-version>0.26.0</tycho-version>
     <tycho-extras-version>${tycho-version}</tycho-extras-version>
     <target-platform>jgit-4.6</target-platform>
   </properties>

pom.xml

@@ -206,7 +206,7 @@
     <slf4j-version>1.7.2</slf4j-version>
     <log4j-version>1.2.15</log4j-version>
     <maven-javadoc-plugin-version>2.10.4</maven-javadoc-plugin-version>
-    <tycho-extras-version>0.25.0</tycho-extras-version>
+    <tycho-extras-version>0.26.0</tycho-extras-version>
     <gson-version>2.2.4</gson-version>
 
     <!-- Properties to enable jacoco code coverage analysis -->