Octodns-ns1

* Improved NS1 API error logging
* Misc improvements to the CI setup, documentation and fix to the release
packaging metadata

* Adds Provider.list_zones to enable new dynamic zone config functionality
* Fix bug around root NS records when creating a new zone. See https://github.com/octodns/octodns-ns1/issues/48
* Bump to [octodns v1.2.0](https://pypi.org/project/octodns/1.2.0/) to pull subnet-targeting related bug fixes

* Allow using actual HTTP monitors instead of emulating them in TCP monitors.
Doing this is not forward-compatible, ie octodns-ns1 cannot be downgraded to
a previous version that doesn't support modern HTTP monitors. It also doesn't
honor the `http_version` configuration because these monitors can only talk
HTTP/1.1.
* Newly added support for subnet targeting using the Netfence Prefix filter

* Dynamic records filter chain ordering reworked to place country filters before
regions, see https://github.com/octodns/octodns-ns1/pull/37 for
details/discussion.
* AS implemented as a list of countries rather than the ASIAPAC region which
didn't match as the AS list of countries in the first place
* AS, NA, and OC source their list of countries from octodns.record.geo_data
rather than manually duplicating the information here.
* Add TL to the list of special case countries so that it can be individually
targeted
* Fix for rule ordering when there's > 10 rules
* Fixed persistent change issue with dynamic records after the API started
returning new fields under `config`
* Fixed persistent change bug when a dynamic record is updated to be a
non-dynamic simple record

* Enable SUPPORTS_ROOT_NS for management of root NS records. Requires
octodns>=0.9.16.
* Configurable http version for dynamic HTTPS monitors, to enable HTTP/1.1 support

* install_requires includes pycountry-convert as it's a runtime requirement
* other misc script/tooling improvements