Upgrade versions; prepare for 2.8.0-M2

Author: garyrussell

build.gradle

@@ -61,12 +61,12 @@ ext {
 	junitJupiterVersion = '5.7.2'
 	kafkaVersion = '2.8.0'
 	log4jVersion = '2.14.1'
-	micrometerVersion = '1.8.0-M1'
+	micrometerVersion = '1.8.0-M2'
 	mockitoVersion = '3.11.2'
-	reactorVersion = '2020.0.9'
+	reactorVersion = '2020.0.10'
 	scalaVersion = '2.13'
 	springBootVersion = '2.4.8' // docs module
-	springDataVersion = '2021.1.0-M1'
+	springDataVersion = '2021.1.0-M2'
 	springRetryVersion = '1.3.1'
 	springVersion = '5.3.9'