config: upgrade guava to 28 for release notes
config: upgrade guava to 28 for release notes
rnveach/contribution,rnveach/contribution,checkstyle/contribution,rnveach/contribution,rnveach/contribution,rnveach/contribution,checkstyle/contribution,checkstyle/contribution,checkstyle/contribution,checkstyle/contribution,rnveach/contribution,checkstyle/contribution,rnveach/contribution,checkstyle/contribution