update all dependencies (maven artifacts)

- PDF dependency was missing in the pom file the JDK8
  * We should think about creating a parent pom - in that case all plantuml dependencies could be in the parent pom and we would only the mantain one pom file.
    (It is also possible to drop the Java 8 support.)
  * Why do we not have any PDF tests?
- add rule to ignore version update hint with `-dev` followed by a dot and date (e.g. `0.37.0-dev.20230308`)
- migration from JUnit4 to JUnit5

src/main/config/rules.xml

@@ -14,6 +14,7 @@
     <ignoreVersion type="regex">(?i).*RC(?:-?\d+)?</ignoreVersion>
     <ignoreVersion type="regex">(?i).*CR(?:-?\d+)?</ignoreVersion>
     <ignoreVersion type="regex">(?i).*M(?:-?\d+)?</ignoreVersion>
+    <ignoreVersion type="regex">(?i).*-dev((?:-?\d+)|(?:\.20\d{6}))?</ignoreVersion>
   </ignoreVersions>
   <rules>
     <rule groupId="net.sourceforge.plantuml" artifactId="plantuml" comparisonMethod="maven">