Bump org.revapi:revapi-java from 0.28.3 to 0.28.4

Bumps [org.revapi:revapi-java](https://github.com/revapi/revapi) from 0.28.3 to 0.28.4.
- [Commits](revapi/revapi@revapi-java_v0.28.3...revapi-java_v0.28.4)

---
updated-dependencies:
- dependency-name: org.revapi:revapi-java
  dependency-version: 0.28.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -59,7 +59,7 @@
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
     <rng.revapi.version>0.15.1</rng.revapi.version>
-    <rng.revapi.java.version>0.28.3</rng.revapi.java.version>
+    <rng.revapi.java.version>0.28.4</rng.revapi.java.version>
     <!-- MathJax configuration. See the maven-javadoc-plugin plugin. -->
     <rng.mathjax.url>https://commons.apache.org/js/mathjax/tex-mml-chtml.js</rng.mathjax.url>
     <!-- Workaround to avoid duplicating config files. -->