Certomancer

This update adds the following features:

* Make Certomancer Animator easier to remount in WSGI (through `SCRIPT_NAME`). For convenience, an optional argument to `animate` was added as well.
* Added CLI arguments to override the external URL prefix specified in the configuration.
* Support including pregenerated certificates in the configuration
* Support key set templates
* Support reusing entire PKI architectures as templates for other ones.


The following miscellaneous were applied:
* Update `pyhanko-certvalidator` dependency in tests.
* Added some asynchronous tests (with `pytest-aiohttp` for compatibility with the `pyhanko-certvalidator` test suite, though any asyncio plugin for pytest should work)

Version 0.5.0 of Certomancer has been published on [PyPi](https://pypi.org/project/certomancer/0.5.0/).

This update adds the following features:
* Backend-based system: Certomancer can now use both `pyca/cryptography` and `oscrypto` as backends. The former enables more features.
* EdDSA support (with `pyca/cryptography`)
* Better PSS support: PSS-exclusive keys, parameters (with `pyca/cryptography`).
* Allow extension values to be specified as raw DER bytes

The following bug fixes were applied:

* Correctly encode pre-2050 notBefore/notAfter
* Consistently use external URLs in Certomancer web UI

Version 0.4.0 of Certomancer has been published on [PyPi](https://pypi.org/project/certomancer/0.4.0/).

This update adds the following two minor features:
- Manipulate Certomancer's (simulated) internal time on a per-request basis using the `X-Certomancer-Fake-Time` header.
- Make PKCS12 passphrases controllable from the CLI.

Other than that, the release improves test coverage, fixes a number of minor bugs and improves the documentation.

Version 0.3.0 of Certomancer has been published on [PyPi](https://pypi.org/project/certomancer/0.3.0/).

This update doesn't add any new features as such, but refactors and streamlines some of the internals. The way service URLs are computed has also changed (without impact on the end result). The optional "backdoor" API for Certomancer Animator has been re-homed under `_certomancer/`, to lower the chances of accidental name conflicts.

Version 0.2.0 of Certomancer has been published on [PyPi](https://pypi.org/project/certomancer/0.2.0/).

This update fixes a boatload of bugs from the first preliminary release, and adds a more streamlined plugin system. The way keys are loaded also changed slightly: Certomancer now takes all paths relative to the config file location by default.

There's also a brand new `docs` folder with some documentation on how the config file is structured, and how to write your own plugins.

Version 0.1.1 of `certomancer` has been published on [PyPi](https://pypi.org/project/certomancer/0.1.1/).

This is a (very) preliminary release; its primary purpose is to allow me to use `certomancer` in GitHub workflows for [pyHanko](https://github.com/MatthiasValvekens/pyHanko).

The only change since the 0.1.0 tag is a backport fix to make some of the type hackery work under Python 3.7.