Update nu.studer.credentials gradle plugin to version 2.2

Author: mbellade

build.gradle

@@ -22,7 +22,7 @@ buildscript {
 plugins {
 	id 'me.champeau.buildscan-recipes' version '0.2.3'
 	id 'io.github.gradle-nexus.publish-plugin' version '1.1.0'
-	id 'nu.studer.credentials' version '2.1'
+	id 'nu.studer.credentials' version '2.2'
 	id 'org.hibernate.build.xjc' version '2.0.1' apply false
 	id 'org.hibernate.build.maven-repo-auth' version '3.0.3' apply false
 	id 'biz.aQute.bnd' version '5.1.1' apply false