Bump Cronos from 0.8.3 to 0.8.4 in /src (#70)

Bumps [Cronos](https://github.com/HangfireIO/Cronos) from 0.8.3 to
0.8.4.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/HangfireIO/Cronos/releases">Cronos's
releases</a>.</em></p>
<blockquote>
<h2>0.8.4</h2>
<h3>Release Notes</h3>
<ul>
<li><strong>Project</strong> – Add an icon for the NuGet package.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/HangfireIO/Cronos/commit/4f8bcd7b76c4779ff353b077b3a3b0743aea0cbc"><code>4f8bcd7</code></a>
Bump Hangfire.Build to version 0.4.2</li>
<li><a
href="https://github.com/HangfireIO/Cronos/commit/5b74ec9e0f3953961c9014bf091503bc3ca0ea31"><code>5b74ec9</code></a>
Add icon for the NuGet package</li>
<li><a
href="https://github.com/HangfireIO/Cronos/commit/f04ba3dc28c94c3770f2382b56e4b2d3780cdad8"><code>f04ba3d</code></a>
Bump version to 0.8.4</li>
<li><a
href="https://github.com/HangfireIO/Cronos/commit/45bd25b69470c0eb716a34d59dea93d6647c60e2"><code>45bd25b</code></a>
Revert &quot;Rename appveyor.yml to .appveyor.yml&quot;</li>
<li>See full diff in <a
href="https://github.com/HangfireIO/Cronos/compare/v0.8.3...v0.8.4">compare
view</a></li>
</ul>
</details>
<br />


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src/Miha.Discord/Miha.Discord.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Cronos" Version="0.8.3" />
+    <PackageReference Include="Cronos" Version="0.8.4" />
     <PackageReference Include="Discord.Addons.Hosting" Version="5.2.0" />
     <PackageReference Include="Discord.Net" Version="3.13.1" />
     <PackageReference Include="Humanizer" Version="2.14.1" />