Bump dart-lang/setup-dart from 1.4.0 to 1.5.0 (#122)

Bumps [dart-lang/setup-dart](https://github.com/dart-lang/setup-dart) from 1.4.0 to 1.5.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/setup-dart/releases">dart-lang/setup-dart's releases</a>.</em></p>
<blockquote>
<h2>v1.5.0</h2>
<ul>
<li>Re-wrote the implementation of the action into Dart.</li>
<li>Auto-detect the platform architecture (<code>x64</code>, <code>ia32</code>, <code>arm</code>, <code>arm64</code>).</li>
<li>Improved the caching and download resilience of the sdk.</li>
<li>Added a new action output: <code>dart-version</code> - the installed version of the sdk.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/setup-dart/blob/main/CHANGELOG.md">dart-lang/setup-dart's changelog</a>.</em></p>
<blockquote>
<h2>v1.5.1-dev</h2>
<ul>
<li>No longer test the <code>setup-dart</code> action on pre-2.12 SDKs.</li>
<li>Upgrade JS interop code to use inline classes.</li>
</ul>
<h2>v1.5.0</h2>
<ul>
<li>Re-wrote the implementation of the action into Dart.</li>
<li>Auto-detect the platform architecture (<code>x64</code>, <code>ia32</code>, <code>arm</code>, <code>arm64</code>).</li>
<li>Improved the caching and download resilience of the sdk.</li>
<li>Added a new action output: <code>dart-version</code> - the installed version of the sdk.</li>
</ul>
<h2>v1.4.0</h2>
<ul>
<li>Automatically create OIDC token for pub.dev.</li>
<li>Add a reusable workflow for publishing.</li>
</ul>
<h2>v1.3.0</h2>
<ul>
<li>The install location of the Dart SDK is now available
in an environment variable, <code>DART_HOME</code>
(<a href="https://redirect.github.com/dart-lang/setup-dart/issues/43">#43</a>).</li>
<li>Fixed an issue where cached downloads could lead to unzip issues
on self-hosted runners
(<a href="https://redirect.github.com/dart-lang/setup-dart/issues/35">#35</a>).</li>
</ul>
<h2>v1.2.0</h2>
<ul>
<li>Fixed a path issue impacting git dependencies on Windows.</li>
</ul>
<h2>v1.1.0</h2>
<ul>
<li>Added a <code>flavor</code> option setup.sh to allow downloading unpublished builds.</li>
</ul>
<h2>v1.0.0</h2>
<ul>
<li>Promoted to 1.0 stable.</li>
</ul>
<h2>v0.5</h2>
<ul>
<li>Fixed a Windows <code>pub global activate</code> path issue.</li>
</ul>
<h2>v0.4</h2>
<ul>
<li>Removed previously deprecated input <code>channel</code>. Use the <code>sdk</code> input instead.</li>
<li>Added support for specifying the CPU architecture.</li>
</ul>
<h2>v0.3</h2>
<ul>
<li>Added support for installing SDKs from the <code>main</code> channel.</li>
</ul>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/dart-lang/setup-dart/commit/d6a63dab3335f427404425de0fbfed4686d93c4f"><code>d6a63da</code></a> rev to stable in prep for publishing (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/83">#83</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/8f7850f0f6056c5b91a1b9c206a53c9b1be28e4e"><code>8f7850f</code></a> use package:dart_flutter_team_lints; address lints (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/81">#81</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/929ed5f8bae55086c6fac456ba5acb9763c9e3e2"><code>929ed5f</code></a> Update README.md (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/80">#80</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/699d6853bbf1b96d77f24d46b19c38c66c2e22b1"><code>699d685</code></a> convert the implementation of the action to Dart (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/77">#77</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/ed899c08a5f73982101e864b0ddb627eac3f03a1"><code>ed899c0</code></a> refactor the CI + testing setup (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/74">#74</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/594ae135024ec3840d3ec08d11c4bec5ff72a368"><code>594ae13</code></a> refactor the readme (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/72">#72</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/4cbd7af027251baa1f95a3e0f11bc5671e4efe27"><code>4cbd7af</code></a> update the readme to reflect the latest version (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/66">#66</a>)</li>
<li><a href="https://github.com/dart-lang/setup-dart/commit/7361df65b6fa01dd7e277a74736305dcdc6ffe62"><code>7361df6</code></a> Bump dart-lang/setup-dart (<a href="https://redirect.github.com/dart-lang/setup-dart/issues/65">#65</a>)</li>
<li>See full diff in <a href="https://github.com/dart-lang/setup-dart/compare/v1.4...d6a63dab3335f427404425de0fbfed4686d93c4f">compare view</a></li>
</ul>
</details>
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