Bump mockito.version from 3.12.4 to 4.0.0 (#448)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -87,7 +87,7 @@
     <!-- To skip the wizard by default in hpi:run. It should not impact other goals. -->
     <hudson.Main.development>true</hudson.Main.development>
 
-    <mockito.version>3.12.4</mockito.version>
+    <mockito.version>4.0.0</mockito.version>
     <access-modifier-checker.version>1.25</access-modifier-checker.version>
     <animal.sniffer.version>1.20</animal.sniffer.version>