119: build(deps): bump embedded-hal from 0.2.3 to 0.2.4 r=jordens a=dependabot[bot]
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Bumps [embedded-hal](https://github.com/japaric/embedded-hal) from 0.2.3 to 0.2.4.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/rust-embedded/embedded-hal/blob/master/CHANGELOG.md">embedded-hal's changelog</a>.</em></p>
<blockquote>
<h1>Change Log</h1>
<p>All notable changes to this project will be documented in this file.</p>
<p>The format is based on <a href="http://keepachangelog.com/">Keep a Changelog</a>
and this project adheres to <a href="http://semver.org/">Semantic Versioning</a>.</p>
<h2>[Unreleased]</h2>
<h2>[v1.0.0-alpha.1] - 2020-06-16</h2>
<p>*** This is an alpha release with breaking changes (sorry) ***</p>
<h3>Added</h3>
<ul>
<li>A nonblocking trait for interfacing with random number generation hardware.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>All traits have been marked as proven (<code>unproven</code> feature has been removed).</li>
<li>All trait methods have been made fallible.</li>
<li>All trait methods have been renamed <code>try_*</code> (i.e. <code>try_send</code>) for consistency.</li>
<li>The <code>Capture</code>, <code>Pwm</code>, <code>PwmPin</code> and <code>Qei</code> traits have been moved into their own
<code>capture</code>, <code>pwm</code> and <code>qei</code> modules for consistency.</li>
<li>Void has been replaced with <code>core::convert::Infallible</code> which should be used
in trait implementations where methods cannot fail.</li>
<li>A new <a href="https://github.com/rust-embedded/embedded-hal#how-to-add-a-new-trait">process</a>
has been adopted for the addition of traits to the embedded-hal.</li>
<li>The minimum supported Rust version is 1.35 due to <a href="https://github-redirect.dependabot.com/rust-lang/rust/issues/54973">this issue</a>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/japaric/embedded-hal/commits">compare view</a></li>
</ul>
</details>
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