Bump pitest-junit5-plugin from 0.11 to 0.12 (#1395)

Bumps [pitest-junit5-plugin](https://github.com/pitest/pitest-junit5-plugin) from 0.11 to 0.12.
- [Release notes](https://github.com/pitest/pitest-junit5-plugin/releases)
- [Commits](pitest/pitest-junit5-plugin@pitest-junit5-plugin-0.11...pitest-junit5-plugin-0.12)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

exonum-light-client/pom.xml

@@ -298,7 +298,7 @@
           <dependency>
             <groupId>org.pitest</groupId>
             <artifactId>pitest-junit5-plugin</artifactId>
-            <version>0.11</version>
+            <version>0.12</version>
           </dependency>
         </dependencies>
       </plugin>