Rwslib

* Allow last response to be optional (important for large requests) (146 )
* resolve issues with CI/publishing

What's Changed
* Feature/add location oid type by glow-mdsol in https://github.com/mdsol/rwslib/pull/145


**Full Changelog**: https://github.com/mdsol/rwslib/compare/1.2.11...1.2.12

This release supports the `mode` keyword for the CAR dataset
In addition the following changes were made:
* Updated the documentation links to point to the corresponding Knowledge Hub links
* Automate the publication of the update docs

* Add missing Subject Location
* Add Lab Reference information to builders
* move to poetry for management
* security fix ups

* Made the installation of `enum34` version linked
* removed 3.3 as it was causing problems with travis ci
* refactored unittests for `rws_cmd` as these were failing because of unclosed socket errors

This fixes the following issues:
* a packaging issue with the `rwslib.builders` module
* missing url from metadata