Upgrade dependencies and Gradle plugins

Prepare for release

Author: artembilan

build.gradle

@@ -16,7 +16,7 @@ plugins {
 	id 'idea'
 	id "org.sonarqube" version '2.7'
 	id 'org.asciidoctor.convert' version '1.5.10'
-	id 'org.ajoberstar.grgit' version '3.0.0'
+	id 'org.ajoberstar.grgit' version '3.1.1'
 }
 
 description = 'Spring Kafka'
@@ -69,23 +69,23 @@ subprojects { subproject ->
 	}
 
 	ext {
-		assertjVersion = '3.12.0'
+		assertjVersion = '3.12.2'
 		googleJsr305Version = '3.0.2'
 		hamcrestVersion = '1.3'
-		hibernateValidationVersion = '6.0.14.Final'
+		hibernateValidationVersion = '6.0.16.Final'
 		jacksonVersion = '2.9.8'
 		jaywayJsonPathVersion = '2.4.0'
 		junit4Version = '4.12'
-		junitJupiterVersion = '5.4.0'
-		junitPlatformVersion = '1.4.0'
+		junitJupiterVersion = '5.4.2'
+		junitPlatformVersion = '1.4.2'
 		kafkaVersion = '2.2.0'
 		log4jVersion = '2.11.2'
-		mockitoVersion = '2.24.0'
+		mockitoVersion = '2.26.0'
 		scalaVersion = '2.12'
 		springRetryVersion = '1.2.4.RELEASE'
 		springVersion = '5.2.0.M1'
 		springDataCommonsVersion = '2.2.0.M3'
-		reactorVersion = '3.2.6.RELEASE'
+		reactorVersion = '3.2.8.RELEASE'
 		reactorKafkaVersion = '1.1.0.RELEASE'
 
 		idPrefix = 'kafka'
@@ -95,7 +95,7 @@ subprojects { subproject ->
 	eclipse.project.natures += 'org.springframework.ide.eclipse.core.springnature'
 
 	jacoco {
-		toolVersion = '0.8.2'
+		toolVersion = '0.8.3'
 	}
 
 	// dependencies that are common across all java projects