Bump net.time4j:time4j-base from 5.9.3 to 5.9.4

Bumps [net.time4j:time4j-base](https://github.com/MenoData/Time4J) from 5.9.3 to 5.9.4.
- [Release notes](https://github.com/MenoData/Time4J/releases)
- [Changelog](https://github.com/MenoData/Time4J/blob/master/CHANGELOG.md)
- [Commits](MenoData/Time4J@v5.9.3...v5.9.4)

---
updated-dependencies:
- dependency-name: net.time4j:time4j-base
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -69,7 +69,7 @@
     <dependency>
       <groupId>net.time4j</groupId>
       <artifactId>time4j-base</artifactId>
-      <version>5.9.3</version>
+      <version>5.9.4</version>
     </dependency>
     <dependency>
       <groupId>net.time4j</groupId>