Changed
* Update AWS Resource specification to v4.3.0
* Build and release with [Azure Pipelines](https://dev.azure.com/garyd203/flying-circus/_build/)
Security
* Upgrade to PyYAML v5.1 from v3.13. This addresses
[CVE-2017-18342](https://security-tracker.debian.org/tracker/CVE-2017-18342),
which was documented in [PyYAML bug 207](https://github.com/yaml/pyyaml/issues/207).
Note that this bug **did not** affect Flying Circus, because YAML is only
dump'ed, and hence there was no unsafe use of `yaml.load` with an untrusted
source)
* Upgrade to Jinja2 v2.10.1 from v2.10. This addresses
[CVE-2019-10906](https://nvd.nist.gov/vuln/detail/CVE-2019-10906). Note that
this bug **did not** affect Flying Circus users, because Jinja2 was only
used in an internal tool.