Update versions; prepare for release

Author: garyrussell

build.gradle

@@ -50,19 +50,19 @@ ext {
 	googleJsr305Version = '3.0.2'
 	hamcrestVersion = '2.2'
 	hibernateValidationVersion = '6.0.17.Final'
-	jacksonVersion = '2.10.3'
+	jacksonVersion = '2.10.4'
 	jaywayJsonPathVersion = '2.4.0'
 	junit4Version = '4.12'
 	junitJupiterVersion = '5.5.2'
 	kafkaVersion = '2.4.1'
 	log4jVersion = '2.12.1'
 	micrometerVersion = '1.3.8'
 	mockitoVersion = '3.1.0'
-	reactorVersion = 'Dysprosium-SR7'
+	reactorVersion = 'Dysprosium-SR8'
 	scalaVersion = '2.12'
 	springRetryVersion = '1.2.5.RELEASE'
-	springVersion = '5.2.6.RELEASE'
-	springDataCommonsVersion = '2.2.7.RELEASE'
+	springVersion = '5.2.7.RELEASE'
+	springDataCommonsVersion = '2.2.8.RELEASE'
 
 	idPrefix = 'kafka'
 }