Upgrade versions; prepare for release

Author: garyrussell

build.gradle

@@ -61,14 +61,14 @@ ext {
 	junitJupiterVersion = '5.7.0'
 	kafkaVersion = '2.7.0'
 	log4jVersion = '2.14.0'
-	micrometerVersion = '1.6.4'
+	micrometerVersion = '1.6.5'
 	mockitoVersion = '3.7.0'
-	reactorVersion = '2020.0.4'
+	reactorVersion = '2020.0.5'
 	scalaVersion = '2.13'
-	springBootVersion = '2.4.2' // docs module
-	springDataVersion = '2021.0.0-M3'
-	springRetryVersion = '1.3.0'
-	springVersion = '5.3.4'
+	springBootVersion = '2.4.3' // docs module
+	springDataVersion = '2021.0.0-M5'
+	springRetryVersion = '1.3.1'
+	springVersion = '5.3.5'
 
 	idPrefix = 'kafka'
 }