config: bump checkstyle maven plugin to 3.0.0
config: bump checkstyle maven plugin to 3.0.0

romani/checkstyle,rnveach/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,jonmbake/checkstyle,jonmbake/checkstyle,jonmbake/checkstyle,rnveach/checkstyle,rnveach/checkstyle,romani/checkstyle,romani/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,romani/checkstyle,checkstyle/checkstyle,romani/checkstyle,checkstyle/checkstyle