Bump VERSION to 1.0.20
Bump VERSION to 1.0.20

jrosengren/ubuntu,falconlulu/ubuntu,erikh/ubuntu,jpsecher/ubuntu,njohns-grovo/ubuntu,grafjo/ubuntu,grafjo/ubuntu,quarkslab/packer-ubuntu,quarkslab/ubuntu,muratayusuke/ubuntu,kenhkan/packer-templates,kontrafiktion/ubuntu,erikh/ubuntu,quarkslab/packer-ubuntu,flandr/ubuntu,falconlulu/ubuntu,NERC-CEH/ubuntu,dragon788/ubuntu,samepage-labs/ubuntu,boxcutter/ubuntu,flandr/ubuntu,samepage-labs/ubuntu,njohns-grovo/ubuntu,muratayusuke/ubuntu,boxcutter/ubuntu,defn/basebox-ubuntu,dragon788/ubuntu,kontrafiktion/ubuntu,jrosengren/ubuntu,tbfisher/packer-ubuntu,quarkslab/ubuntu,NERC-CEH/ubuntu,kenhkan/packer-templates,jpsecher/ubuntu,tbfisher/packer-ubuntu