update development version to 0.19.0
update development version to 0.19.0

gem/oq-engine,rcgee/oq-hazardlib,vup1120/oq-hazardlib,gem/oq-hazardlib,gem/oq-engine,gem/oq-engine,vup1120/oq-hazardlib,rcgee/oq-hazardlib,gem/oq-engine,vup1120/oq-hazardlib,gem/oq-hazardlib,gem/oq-hazardlib,gem/oq-engine