build(deps): bump com.github.siom79.japicmp:japicmp-maven-plugin

Bumps [com.github.siom79.japicmp:japicmp-maven-plugin](https://github.com/siom79/japicmp) from 0.21.0 to 0.21.1.
- [Release notes](https://github.com/siom79/japicmp/releases)
- [Changelog](https://github.com/siom79/japicmp/blob/master/release.py)
- [Commits](siom79/japicmp@japicmp-base-0.21.0...japicmp-base-0.21.1)

---
updated-dependencies:
- dependency-name: com.github.siom79.japicmp:japicmp-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -432,7 +432,7 @@
                 <plugin>
                     <groupId>com.github.siom79.japicmp</groupId>
                     <artifactId>japicmp-maven-plugin</artifactId>
-                    <version>0.21.0</version>
+                    <version>0.21.1</version>
                     <configuration>
                         <oldVersion>
                             <dependency>