chore: Replaced Greenkeeper badge with Dependabot badge (#827)

Author: edgardmessias

README.md

@@ -9,7 +9,7 @@
 
 [![Dependencies Status](https://david-dm.org/JohnstonCode/svn-scm/status.svg)](https://david-dm.org/JohnstonCode/svn-scm)
 [![DevDependencies Status](https://david-dm.org/JohnstonCode/svn-scm/dev-status.svg)](https://david-dm.org/JohnstonCode/svn-scm?type=dev)
-[![Greenkeeper badge](https://badges.greenkeeper.io/JohnstonCode/svn-scm.svg)](https://greenkeeper.io/)
+[![Dependabot badge](https://badgen.net/dependabot/JohnstonCode/svn-scm/?icon=dependabot)](https://dependabot.com/)
 
 [![Known Vulnerabilities](https://snyk.io/test/github/JohnstonCode/svn-scm/badge.svg)](https://snyk.io/test/github/JohnstonCode/svn-scm)