Update spotbugs from 3.1.0 to 3.1.2 to get rid of dom4j errors
Update spotbugs from 3.1.0 to 3.1.2 to get rid of dom4j errors

Spotbugs updated the dom4j dependency in 3.1.2 -- see
https://github.com/spotbugs/spotbugs/issues/300

loom-build-tool/loom,loom-build-tool/loom