Upgrade Micrometer version

Author: garyrussell

build.gradle

@@ -47,7 +47,7 @@ ext {
 	junitJupiterVersion = '5.5.2'
 	kafkaVersion = '2.3.1'
 	log4jVersion = '2.12.1'
-	micrometerVersion = '1.3.8'
+	micrometerVersion = '1.3.11'
 	mockitoVersion = '3.1.0'
 	reactorVersion = 'Dysprosium-SR12'
 	scalaVersion = '2.12'