Bump mockitoVersion from 3.5.0 to 3.5.2 (#1019)

Author: dependabot-preview[bot]

build.gradle

@@ -74,7 +74,7 @@ ext {
     junitLauncherVersion = "1.6.2"
     hamcrestVersion = "2.2"
     logbackVersion = "1.2.3"
-    mockitoVersion = "3.5.0"
+    mockitoVersion = "3.5.2"
     otjPgVersion = "0.13.3"
     qpidVersion = "8.0.0"
     sleepycatVersion = "18.3.12"