fix(deps): Bump awala from 1.50.0 to 1.51.0 (#159)

Bumps [awala](https://github.com/relaycorp/awala-jvm) from 1.50.0 to 1.51.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/relaycorp/awala-jvm/releases">awala's releases</a>.</em></p>
<blockquote>
<h2>v1.51.0</h2>
<h1><a href="https://github.com/relaycorp/awala-jvm/compare/v1.50.0...v1.51.0">1.51.0</a> (2021-10-31)</h1>
<h3>Features</h3>
<ul>
<li>Implement key stores (<a href="https://github-redirect.dependabot.com/relaycorp/awala-jvm/issues/172">#172</a>) (<a href="https://github.com/relaycorp/awala-jvm/commit/ef1611a4b8b900a275f8d73099e1dbc4bd7898f9">ef1611a</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/relaycorp/awala-jvm/commit/ef1611a4b8b900a275f8d73099e1dbc4bd7898f9"><code>ef1611a</code></a> feat: Implement key stores (<a href="https://github-redirect.dependabot.com/relaycorp/awala-jvm/issues/172">#172</a>)</li>
<li>See full diff in <a href="https://github.com/relaycorp/awala-jvm/compare/v1.50.0...v1.51.0">compare view</a></li>
</ul>
</details>
<br />


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</details>

lib/build.gradle

@@ -64,7 +64,7 @@ dependencies {
   implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlinCoroutinesVersion"
 
   // Awala
-  implementation 'tech.relaycorp:awala:1.50.0'
+  implementation 'tech.relaycorp:awala:1.51.0'
   implementation 'tech.relaycorp:poweb:1.5.24'
 
   // Security