Upgrade to Mockito 2.23.0

Closes gh-14767

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -131,7 +131,7 @@
 		<lombok.version>1.18.2</lombok.version>
 		<mariadb.version>2.3.0</mariadb.version>
 		<micrometer.version>1.1.0-SNAPSHOT</micrometer.version>
-		<mockito.version>2.22.0</mockito.version>
+		<mockito.version>2.23.0</mockito.version>
 		<mongo-driver-reactivestreams.version>1.9.2</mongo-driver-reactivestreams.version>
 		<mongodb.version>3.8.2</mongodb.version>
 		<mssql-jdbc.version>6.4.0.jre8</mssql-jdbc.version>