Bump org.eclipse.cbi.maven.plugins:eclipse-jarsigner-plugin from 1.5.3 to 1.5.4 (#126)

Bump org.eclipse.cbi.maven.plugins:eclipse-jarsigner-plugin

Bumps org.eclipse.cbi.maven.plugins:eclipse-jarsigner-plugin from 1.5.3 to 1.5.4.

---
updated-dependencies:
- dependency-name: org.eclipse.cbi.maven.plugins:eclipse-jarsigner-plugin
  dependency-version: 1.5.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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org.eclipse.eclemma.build/pom.xml

@@ -885,7 +885,7 @@
           <plugin>
             <groupId>org.eclipse.cbi.maven.plugins</groupId>
             <artifactId>eclipse-jarsigner-plugin</artifactId>
-            <version>1.5.3</version>
+            <version>1.5.4</version>
             <executions>
               <execution>
                 <id>sign</id>