chore(deps-dev): bump async-solipsism from 0.8 to 0.9 (#239)

Bumps [async-solipsism](https://github.com/bmerry/async-solipsism) from
0.8 to 0.9.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/bmerry/async-solipsism/commit/f13e9f6128e219a94e9d242ed716903aaf0a2d8d"><code>f13e9f6</code></a>
Bump version to 0.9</li>
<li><a
href="https://github.com/bmerry/async-solipsism/commit/001311a837209d2316f15bfe7b477c059b1b68bb"><code>001311a</code></a>
Use Runner with factory that sets event loop</li>
<li><a
href="https://github.com/bmerry/async-solipsism/commit/28bc090d41f668eb27f1f46203672a4e4209a9aa"><code>28bc090</code></a>
Make things work on latest pytest-asyncio</li>
<li><a
href="https://github.com/bmerry/async-solipsism/commit/f1157336950a7157b9278f880415e4d055eca646"><code>f115733</code></a>
Remove pytest marks to support Python &lt; 3.7</li>
<li><a
href="https://github.com/bmerry/async-solipsism/commit/ccf1d303bb425fb4a4fc6b56804998ef03c9429a"><code>ccf1d30</code></a>
Update assorted dependencies</li>
<li><a
href="https://github.com/bmerry/async-solipsism/commit/dbd3d1bed04e4f80a0c0d23247ea842b7128ced4"><code>dbd3d1b</code></a>
Switch to uv for pip-compile pre-commit hook</li>
<li>See full diff in <a
href="https://github.com/bmerry/async-solipsism/compare/0.8...0.9">compare
view</a></li>
</ul>
</details>
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Author: matthias-wende-frequenz

pyproject.toml

@@ -100,7 +100,7 @@ dev-pytest = [
   "frequenz-repo-config[extra-lint-examples] == 0.13.8",
   "pytest-mock == 3.15.1",
   "pytest-asyncio == 1.3.0",
-  "async-solipsism == 0.8",
+  "async-solipsism == 0.9",
   "deepdiff == 8.6.1",
 ]
 dev = [