Update tzdata requirement from ==2022.* to ==2023.* (#181)

Updates the requirements on [tzdata](https://github.com/python/tzdata)
to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/python/tzdata/releases">tzdata's
releases</a>.</em></p>
<blockquote>
<h2>2023.3: Release of upstream tzdata 2023c</h2>
<h1>Version 2023.3</h1>
<p>Upstream version 2023c released 2023-03-28T19:42:14+00:00</p>
<h2>Changes to past and future timestamps</h2>
<p>Model Lebanon's DST chaos by reverting data to tzdb 2023a. (Thanks to
Rany Hany
for the heads-up.)</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/python/tzdata/blob/master/NEWS.md">tzdata's
changelog</a>.</em></p>
<blockquote>
<h1>Version 2023.3</h1>
<p>Upstream version 2023c released 2023-03-28T19:42:14+00:00</p>
<h2>Changes to past and future timestamps</h2>
<p>Model Lebanon's DST chaos by reverting data to tzdb 2023a. (Thanks to
Rany Hany
for the heads-up.)</p>
<hr />
<h1>Version 2023.2</h1>
<p>Upstream version 2023b released 2023-03-24T02:50:38+00:00</p>
<h2>Briefly:</h2>
<p>Lebanon delays the start of DST this year.</p>
<h2>Changes to future timestamps</h2>
<p>This year Lebanon springs forward April 20/21 not March 25/26.
(Thanks to
Saadallah Itani.)</p>
<hr />
<h1>Version 2023.1</h1>
<p>Upstream version 2023a released 2023-03-22T19:39:33+00:00</p>
<h2>Briefly:</h2>
<p>Egypt now uses DST again, from April through October. This year
Morocco springs
forward April 23, not April 30. Palestine delays the start of DST this
year.
Much of Greenland still uses DST from 2024 on. America/Yellowknife now
links to
America/Edmonton. tzselect can now use current time to help infer
timezone. The
code now defaults to C99 or later. Fix use of C23 attributes.</p>
<h2>Changes to future timestamps</h2>
<p>Starting in 2023, Egypt will observe DST from April's last Friday
through
October's last Thursday. (Thanks to Ahmad ElDardiry.) Assume the
transition
times are 00:00 and 24:00, respectively.</p>
<p>In 2023 Morocco's spring-forward transition after Ramadan will occur
April 23,
not April 30.  (Thanks to Milamber.) Adjust predictions for future years
accordingly. This affects predictions for 2023, 2031, 2038, and later
years.</p>
<p>This year Palestine will delay its spring forward from March 25 to
April 29 due
to Ramadan. (Thanks to Heba Hamad.) Make guesses for future Ramadans
too.</p>
<p>Much of Greenland, represented by America/Nuuk, will continue to
observe DST
using European Union rules. When combined with Greenland's decision not
to</p>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/python/tzdata/commit/1e593a4124a29eccab092e27d397bcb201375671"><code>1e593a4</code></a>
Update tzdata to 2023c</li>
<li><a
href="https://github.com/python/tzdata/commit/3ab6e77280868fa5dd6cb3f7bdbb11e1face7bb1"><code>3ab6e77</code></a>
Update tzdata to 2023b</li>
<li><a
href="https://github.com/python/tzdata/commit/c15b7e71155cd067ff9f2d4f56fa23b3ae2a8752"><code>c15b7e7</code></a>
Update tzdata to 2023a</li>
<li><a
href="https://github.com/python/tzdata/commit/1c9a0aee1a02dac52319e89dfdbc872435327f8d"><code>1c9a0ae</code></a>
Merge pull request <a
href="https://redirect.github.com/python/tzdata/issues/62">#62</a> from
pganssle/2022g</li>
<li><a
href="https://github.com/python/tzdata/commit/6dba264c59464eb805630bffe372eac67a486f2e"><code>6dba264</code></a>
Bump version to 2022g</li>
<li><a
href="https://github.com/python/tzdata/commit/cf79c2d3ec8ccb6bbe6aca659680130282ecacac"><code>cf79c2d</code></a>
Merge pull request <a
href="https://redirect.github.com/python/tzdata/issues/63">#63</a> from
pganssle/fix_gha</li>
<li><a
href="https://github.com/python/tzdata/commit/862d36410115ef1b19395a0c9188a89f070d02cf"><code>862d364</code></a>
Update pre-commit configurations to Python 3.10</li>
<li><a
href="https://github.com/python/tzdata/commit/da7cc8c814113bca5710c4495c3d62e5232d4adf"><code>da7cc8c</code></a>
Fix typing issues</li>
<li><a
href="https://github.com/python/tzdata/commit/79e9073cb02020e27319a7a2e3d935da578f121c"><code>79e9073</code></a>
Switch Python 2.7 and 3.6 to older base images</li>
<li><a
href="https://github.com/python/tzdata/commit/bb9d74c4c122b1a1da7e0f6361e7404d9e7773c6"><code>bb9d74c</code></a>
Merge pull request <a
href="https://redirect.github.com/python/tzdata/issues/61">#61</a> from
pganssle/upgrade_versions</li>
<li>Additional commits viewable in <a
href="https://github.com/python/tzdata/compare/2022.1...2023.3">compare
view</a></li>
</ul>
</details>
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</details>

Author: Guts

requirements/base.txt

@@ -5,4 +5,4 @@
 GitPython>=3.1,<3.2
 mkdocs>=1.1,<2
 pytz==2022.* ; python_version < "3.9"
-tzdata==2022.* ; python_version >= "3.9" and sys_platform == "win32"
+tzdata==2023.* ; python_version >= "3.9" and sys_platform == "win32"