Add sonarcloud badge

Author: dmaccormack

README.md

@@ -2,8 +2,10 @@
 [![Apache License, Version 2.0, January 2004](https://img.shields.io/github/license/jsonurl/jsonurl-java.svg?label=License)](https://www.apache.org/licenses/LICENSE-2.0)
 [![Release](https://img.shields.io/github/release/jsonurl/jsonurl-java.svg?label=Release)](https://search.maven.org/search?q=g:org.jsonurl)
 [![Build Status](https://travis-ci.com/jsonurl/jsonurl-java.svg?branch=master)](https://travis-ci.com/jsonurl/jsonurl-java)
-[![Known Vulnerabilities](https://snyk.io/test/github/jsonurl/jsonurl-java/badge.svg?targetFile=module/jsonurl-jsonorg/pom.xml)](https://snyk.io/test/github/jsonurl/jsonurl-java?targetFile=module/jsonurl-jsonorg/pom.xml)
-[![Known Vulnerabilities](https://snyk.io/test/github/jsonurl/jsonurl-java/badge.svg?targetFile=module/jsonurl-jsr374/pom.xml)](https://snyk.io/test/github/jsonurl/jsonurl-java?targetFile=module/jsonurl-jsr374/pom.xml)
+[![Quality Gate](https://sonarcloud.io/api/project_badges/measure?project=jsonurl_jsonurl-java&metric=alert_status)](https://sonarcloud.io/dashboard?id=jsonurl_jsonurl-java)
+
+Module org.json: [![Known Vulnerabilities](https://snyk.io/test/github/jsonurl/jsonurl-java/badge.svg?targetFile=module/jsonurl-jsonorg/pom.xml)](https://snyk.io/test/github/jsonurl/jsonurl-java?targetFile=module/jsonurl-jsonorg/pom.xml)
+Module java.json: [![Known Vulnerabilities](https://snyk.io/test/github/jsonurl/jsonurl-java/badge.svg?targetFile=module/jsonurl-jsr374/pom.xml)](https://snyk.io/test/github/jsonurl/jsonurl-java?targetFile=module/jsonurl-jsr374/pom.xml)
 
 ## About
 RFC8259 describes the JSON data model and interchange format, which is widely