Bump com.github.klieber:phantomjs-maven-plugin from 0.4 to 0.6

Bumps [com.github.klieber:phantomjs-maven-plugin](https://github.com/klieber/phantomjs-maven-plugin) from 0.4 to 0.6.
- [Release notes](https://github.com/klieber/phantomjs-maven-plugin/releases)
- [Commits](klieber/phantomjs-maven-plugin@0.4...0.6)

---
updated-dependencies:
- dependency-name: com.github.klieber:phantomjs-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

ui/pom.xml

@@ -132,7 +132,7 @@
             <plugin>
                 <groupId>com.github.klieber</groupId>
                 <artifactId>phantomjs-maven-plugin</artifactId>
-                <version>0.4</version>
+                <version>0.6</version>
                 <executions>
                     <execution>
                         <phase>process-test-resources</phase>