Upgrade MongoDB drivers to 4.2.0.

Closes #3553

Author: christophstrobl

pom.xml

@@ -27,7 +27,7 @@
 		<project.type>multi</project.type>
 		<dist.id>spring-data-mongodb</dist.id>
 		<springdata.commons>2.5.0-SNAPSHOT</springdata.commons>
-		<mongo>4.1.1</mongo>
+		<mongo>4.2.0</mongo>
 		<mongo.reactivestreams>${mongo}</mongo.reactivestreams>
 		<jmh.version>1.19</jmh.version>
 	</properties>