Upgrade dependency versions

Author: garyrussell

build.gradle

@@ -78,15 +78,16 @@ subprojects { subproject ->
 	ext {
 		assertjVersion = '2.6.0'
 		hamcrestVersion = '1.3'
-		jacksonVersion = '2.8.10'
+		jacksonVersion = '2.8.11'
+		jacksonDataBindVersion = '2.8.11.1'
 		junitVersion = '4.12'
 		kafkaVersion = '0.11.0.2'
 		log4jVersion = '1.2.17'
 		mockitoVersion = '1.10.19'
 		scalaVersion = '2.11'
-		slf4jVersion = '1.7.22'
+		slf4jVersion = '1.7.25'
 		springRetryVersion = '1.2.2.RELEASE'
-		springVersion = '4.3.17.RELEASE'
+		springVersion = '4.3.18.RELEASE'
 
 		idPrefix = 'kafka'
 
@@ -169,7 +170,7 @@ project ('spring-kafka') {
 		}
 
 		compile ("com.fasterxml.jackson.core:jackson-core:$jacksonVersion", optional)
-		compile ("com.fasterxml.jackson.core:jackson-databind:$jacksonVersion", optional)
+		compile ("com.fasterxml.jackson.core:jackson-databind:$jacksonDataBindVersion", optional)
 
 		testCompile project (":spring-kafka-test")
 		testCompile "org.assertj:assertj-core:$assertjVersion"