Update min Maven version

Author: oschwald

pom.xml

@@ -113,7 +113,7 @@
                     <configuration>
                       <rules>
                         <requireMavenVersion>
-                          <version>3.2.5</version>
+                          <version>3.6.3</version>
                         </requireMavenVersion>
                       </rules>
                     </configuration>