switch to findbugs replacement that is still maintained (spotbugs)

     [java] WARNING: An illegal reflective access operation has occurred
     [java] WARNING: Illegal reflective access by org.dom4j.io.SAXContentHandler (file:/C:/Users/jre/.m2/repository/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar) to method com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser$LocatorProxy.getEncoding()
     [java] WARNING: Please consider reporting this to the maintainers of org.dom4j.io.SAXContentHandler
     [java] WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
     [java] WARNING: All illegal access operations will be denied in a future release
     [java] Warning: Unknown version of Java
     [java] edu.umd.cs.findbugs.JavaVersionException: Could not parse Java version string: 10