(maint) bump version to 4.2.4-SNAPSHOT
(maint) bump version to 4.2.4-SNAPSHOT

puppetlabs/puppetdb,senior/puppetdb,mullr/puppetdb,waynr/puppetdb,puppetlabs/puppetdb,waynr/puppetdb,senior/puppetdb,mullr/puppetdb,waynr/puppetdb,mullr/puppetdb,rbrw/puppetdb,rbrw/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,rbrw/puppetdb,waynr/puppetdb,senior/puppetdb,senior/puppetdb