Merge pull request #413 from tomcat-slf4j-logback/renovate/org.codehaus.mojo-versions-maven-plugin-2.x

Update dependency org.codehaus.mojo:versions-maven-plugin to v2.21.0

Author: hazendaz

pom.xml

@@ -445,7 +445,7 @@
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>versions-maven-plugin</artifactId>
-                    <version>2.20.1</version>
+                    <version>2.21.0</version>
                 </plugin>
 
                 <plugin>