update 3rd party libs

spring boot to 2.0.1
guava to 24.1-jre
jackson to 2.9.5
log4j2 to 2.10.0 (same version as pulled by spring boot)
testng to 6.14.3

build.gradle

@@ -46,10 +46,10 @@ subprojects {
 	
 	// dependencies that all sub-projects have 
 	dependencies {
-		testCompile group: 'org.testng', name: 'testng', version: '6.13.1'
+		testCompile group: 'org.testng', name: 'testng', version: '6.14.3'
 	}
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '4.6'
+    gradleVersion = '4.7'
 }