Upgrade Spring dependencies

Author: garyrussell

build.gradle

@@ -65,8 +65,8 @@ ext {
 	reactorVersion = 'Dysprosium-RELEASE'
 	scalaVersion = '2.12'
 	springRetryVersion = '1.2.4.RELEASE'
-	springVersion = '5.2.0.RELEASE'
-	springDataCommonsVersion = '2.2.0.RELEASE'
+	springVersion = '5.2.1.RELEASE'
+	springDataCommonsVersion = '2.2.1.RELEASE'
 
 	idPrefix = 'kafka'
 }