Actually bump version to 0.2.0
Actually bump version to 0.2.0

In a7d371d49211be4c8e45c373f172bafa9e93e538 I omitted to bump the
version to 0.2.0 in `lib/vcloud/core/version.rb`.

gds-operations/vcloud-core,UKHomeOffice/vcloud-core,gds-operations/vcloud-core,UKHomeOffice/vcloud-core