fix(deps): Bump protobufGradleVersion from 0.8.15 to 0.8.16 (#120)

Bumps `protobufGradleVersion` from 0.8.15 to 0.8.16.
Updates `protobuf-gradle-plugin` from 0.8.15 to 0.8.16
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/google/protobuf-gradle-plugin/releases">protobuf-gradle-plugin's releases</a>.</em></p>
<blockquote>
<h2>v0.8.16 is released</h2>
<h2>Fixed bugs</h2>
<ul>
<li>Make compileProtoPath variant selection criteria tighter by adding JAVA_RUNTIME usage attribute. Without this, dependency resolution may result in ambiguous variant selection error if the dependency exposes variants with different usages (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/489">#489</a>)</li>
<li>Add explicit DuplicatesStrategy as required by Gradle 7+ (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/487">#487</a>)</li>
</ul>
<h2>Improvements</h2>
<ul>
<li>Mark generated code as &quot;generated&quot; folder in IDEA, so that users will get warned if they try to edit those files (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/477">#477</a>)</li>
<li>Support outputting generated code directly into JAR/ZIP (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/480">#480</a>)</li>
</ul>
<h2>Thanks to contributors</h2>
<ul>
<li><a href="https://github.com/oehme"><code>@​oehme</code></a></li>
<li><a href="https://github.com/karuppiah7890"><code>@​karuppiah7890</code></a></li>
<li><a href="https://github.com/tom-haines"><code>@​tom-haines</code></a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/784f97db12ef3d041d3ca68d07308f3b46e1cb48"><code>784f97d</code></a> 0.8.16 release</li>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/44309a20736dbfa5de3bb3e50a2566fb994ab936"><code>44309a2</code></a> Make compileProtoPath variant selection criteria tighter (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/489">#489</a>)</li>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/76a1922a83de85d13286e8fdfcec4bcae54427a8"><code>76a1922</code></a> Add explicit DuplicatesStrategy as required by gradle 7+ (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/487">#487</a>)</li>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/1ff7893d212511a8284b4d65d84e1a4ba02a0d7c"><code>1ff7893</code></a> Fix typo for setting descriptor location in README example (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/484">#484</a>)</li>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/cd45c9d0579a51d2d355d6754167d68a70735c4d"><code>cd45c9d</code></a> Support outputting generated code directly into JAR/ZIP archives (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/480">#480</a>)</li>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/0500ff355e4967b46d9a08b90f720007a6deb54f"><code>0500ff3</code></a> Mark generated source dirs in IDEA (<a href="https://github-redirect.dependabot.com/google/protobuf-gradle-plugin/issues/477">#477</a>)</li>
<li><a href="https://github.com/google/protobuf-gradle-plugin/commit/568b37351131222af1dea14c55eedfa963baaa63"><code>568b373</code></a> Start 0.8.16 development cycle</li>
<li>See full diff in <a href="https://github.com/google/protobuf-gradle-plugin/compare/v0.8.15...v0.8.16">compare view</a></li>
</ul>
</details>
<br />

Updates `com.google.protobuf` from 0.8.15 to 0.8.16


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build.gradle

@@ -6,7 +6,7 @@ buildscript{
     kotlinCoroutinesVersion = '1.5.0'
     grpcVersion = '1.39.0'
     protobufVersion = '3.17.3'
-    protobufGradleVersion = '0.8.15'
+    protobufGradleVersion = '0.8.16'
   }
 }