update dependency org.mockito:mockito-core 2.22.0 -> 2.23.4

Author: TheSnoozer

pom.xml

@@ -59,7 +59,7 @@
 
     <jgit.version>5.1.1.201809181055-r</jgit.version>
     <junit.version>5.3.1</junit.version>
-    <mockito.version>2.22.0</mockito.version>
+    <mockito.version>2.23.4</mockito.version>
 
     <fest-assert.version>1.4</fest-assert.version>
   </properties>