Merge remote-tracking branch 'origin/master' into to/#133-add-scala-package

Author: t-ober

build.gradle

@@ -5,8 +5,8 @@ plugins {
 	id 'maven-publish'
 	id 'signing'
 	id 'pmd' //code check, working on source code
-	id 'com.github.spotbugs' version '4.7.8' //code check, working on byte code
-	id 'com.diffplug.spotless' version '5.17.0'//code format
+	id 'com.github.spotbugs' version '4.8.0' //code check, working on byte code
+	id 'com.diffplug.spotless' version '6.0.0'//code format
 	id 'com.simonharrer.modernizer' version '2.1.0-1' //detect deprecated APIs
 	id 'com.github.onslip.gradle-one-jar' version '1.0.6' // pack a self contained jar
 	id 'jacoco' // java code coverage plugin
@@ -62,7 +62,7 @@ dependencies {
 
 	compile 'javax.measure:unit-api:2.1.3' // quantities
 	compile 'tech.units:indriya:2.1.2'  // quantities
-	compile 'com.google.code.gson:gson:2.8.8' // java serialization, POJOs -> JSON
+	compile 'com.google.code.gson:gson:2.8.9' // java serialization, POJOs -> JSON
 	compile 'org.apache.commons:commons-lang3:3.12.0' // for HashCodeBuilder
 	compile 'com.github.johanneshiry:OSMonaut:v1.1.1' // pbf parser
 	compile 'org.apache.commons:commons-math3:3.6.1' // mathematics and statistics components