chore(deps): update dependency com.github.siom79.japicmp:japicmp-maven-plugin to v0.25.6 (#300)

This PR contains the following updates:

| Package | Change |
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[com.github.siom79.japicmp:japicmp-maven-plugin](https://redirect.github.com/siom79/japicmp)
| `0.25.5` → `0.25.6` |
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|
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pom.xml

@@ -75,7 +75,7 @@
         <plugin>
           <groupId>com.github.siom79.japicmp</groupId>
           <artifactId>japicmp-maven-plugin</artifactId>
-          <version>0.25.5</version>
+          <version>0.25.6</version>
         </plugin>
         <!-- Spotless for code formatting -->
         <plugin>