🤖 I have created a release *beep* *boop*
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### Updating meta-information for bleeding-edge SNAPSHOT release.

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* fix: Make supporting classes of AwsCredentials serializable

* Add unit test for ExternalAccountCredentials test.
Discovered ServiceAccountImpersonationOptions needed be serializable as well.

* Fix linting

* Add serialization tests for subclasses of ExternalAccountCredentials

Note that PluggableAuthCredentials uses a non-serializable ExecutableHandler.
It's not clear that this can/should be a serializable credential source.

* Add serialVersionUID fields to classes implementing ExternalAccountCredentials

Bumps [cryptography](https://togithub.com/pyca/cryptography) from 38.0.3 to 39.0.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://togithub.com/pyca/cryptography/blob/main/CHANGELOG.rst">cryptography's changelog</a>.</em></p>
<blockquote>
<p>39.0.1 - 2023-02-07</p>
<pre><code>
* **SECURITY ISSUE** - Fixed a bug where ``Cipher.update_into`` accepted Python
  buffer protocol objects, but allowed immutable buffers. **CVE-2023-23931**
* Updated Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.0.8.
<p>.. _v39-0-0:</p>
<p>39.0.0 - 2023-01-01
</code></pre></p>
<ul>
<li><strong>BACKWARDS INCOMPATIBLE:</strong> Support for OpenSSL 1.1.0 has been removed.
Users on older version of OpenSSL will need to upgrade.</li>
<li><strong>BACKWARDS INCOMPATIBLE:</strong> Dropped support for LibreSSL &lt; 3.5. The new
minimum LibreSSL version is 3.5.0. Going forward our policy is to support
versions of LibreSSL that are available in versions of OpenBSD that are
still receiving security support.</li>
<li><strong>BACKWARDS INCOMPATIBLE:</strong> Removed the <code>encode_point</code> and
<code>from_encoded_point</code> methods on
:class:<code>~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers</code>,
which had been deprecated for several years.
:meth:<code>~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.public_bytes</code>
and
:meth:<code>~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.from_encoded_point</code>
should be used instead.</li>
<li><strong>BACKWARDS INCOMPATIBLE:</strong> Support for using MD5 or SHA1 in
:class:<code>~cryptography.x509.CertificateBuilder</code>, other X.509 builders, and
PKCS7 has been removed.</li>
<li><strong>BACKWARDS INCOMPATIBLE:</strong> Dropped support for macOS 10.10 and 10.11, macOS
users must upgrade to 10.12 or newer.</li>
<li><strong>ANNOUNCEMENT:</strong> The next version of <code>cryptography</code> (40.0) will change
the way we link OpenSSL. This will only impact users who build
<code>cryptography</code> from source (i.e., not from a <code>wheel</code>), and specify their
own version of OpenSSL. For those users, the <code>CFLAGS</code>, <code>LDFLAGS</code>,
<code>INCLUDE</code>, <code>LIB</code>, and <code>CRYPTOGRAPHY_SUPPRESS_LINK_FLAGS</code> environment
variables will no longer be respected. Instead, users will need to
configure their builds <code>as documented here</code>_.</li>
<li>Added support for
:ref:<code>disabling the legacy provider in OpenSSL 3.0.x&lt;legacy-provider&gt;</code>.</li>
<li>Added support for disabling RSA key validation checks when loading RSA
keys via
:func:<code>~cryptography.hazmat.primitives.serialization.load_pem_private_key</code>,
:func:<code>~cryptography.hazmat.primitives.serialization.load_der_private_key</code>,
and
:meth:<code>~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateNumbers.private_key</code>.
This speeds up key loading but is :term:<code>unsafe</code> if you are loading potentially
attacker supplied keys.</li>
<li>Significantly improved performance for
:class:<code>~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305</code></li>
</ul>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://togithub.com/pyca/cryptography/commit/d6951dca25de45abd52da51b608055371fbcde4e"><code>d6951dc</code></a> changelog + security fix backport (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/8231">#8231</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/138da90c8450446b19619e3faa77b9da54c34be3"><code>138da90</code></a> workaround scapy bug in downstream tests (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/8218">#8218</a>) (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/8228">#8228</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/69527bc79095c9646d7e839121f0783477892ecc"><code>69527bc</code></a> bookworm is py311 now (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/8200">#8200</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/111deefb659b8d73c56d3ce89458f2df973d60e4"><code>111deef</code></a> backport main branch CI to 39.0.x (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/8153">#8153</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/338a65a7df74e189f6b5d1d3a6315ffa911b21c2"><code>338a65a</code></a> 39.0.0 version bump (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/7954">#7954</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/84a3cd7abb16f594d8c315e8aedb4be02583bf6a"><code>84a3cd7</code></a> automatically download and upload circleci wheels (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/7949">#7949</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/525c0b3d5d89eab7f953be5de5d2b75da1c816f8"><code>525c0b3</code></a> Type annotate release.py (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/7951">#7951</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/46d2a94d1b574abf5b9e88f84fa7400a138c4edb"><code>46d2a94</code></a> Use the latest 3.10 release when wheel building (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/7953">#7953</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/f150dc15582c05b1b94cf08ed3b1fbc9c4f52267"><code>f150dc1</code></a> fix CI to work with ubuntu 22.04 (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/7950">#7950</a>)</li>
<li><a href="https://togithub.com/pyca/cryptography/commit/8867724b2b6db528d2900414ef86c122a1f5602a"><code>8867724</code></a> fix README for python3 (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/7947">#7947</a>)</li>
<li>Additional commits viewable in <a href="https://togithub.com/pyca/cryptography/compare/38.0.3...39.0.1">compare view</a></li>
</ul>
</details>
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* disabling owl bot

* fix bogus import error by changing import order

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* exclude ExternalAccount from owl bot

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