[releng] Move to eclipse-jarsigner-plugin 1.3.1

Change-Id: I1ef0919ac881f2aa616add1650bd9cc167ce2469
Signed-off-by: Maxime Porhel <maxime.porhel@obeo.fr>
diff --git a/org.eclipse.emf.ecoretools.build/pom.xml b/org.eclipse.emf.ecoretools.build/pom.xml
index cf03ca2..8a3d5ec 100644
--- a/org.eclipse.emf.ecoretools.build/pom.xml
+++ b/org.eclipse.emf.ecoretools.build/pom.xml
@@ -224,7 +224,7 @@
           <plugin>
             <groupId>org.eclipse.cbi.maven.plugins</groupId>
             <artifactId>eclipse-jarsigner-plugin</artifactId>
-            <version>1.0.4</version>
+            <version>1.3.1</version>
             <executions>
               <execution>
                 <id>sign</id>