build(deps): Bump prost-build from 0.12.1 to 0.12.3 (#375)

Bumps [prost-build](https://github.com/tokio-rs/prost) from 0.12.1 to 0.12.3.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/tokio-rs/prost/commit/907e9f6fbf72262f52333459bbfb27224da1ad72"><code>907e9f6</code></a> prost: prepare release <code>0.12.3</code> (<a href="https://redirect.github.com/tokio-rs/prost/issues/947">#947</a>)</li>
<li><a href="https://github.com/tokio-rs/prost/commit/acc1df83f73cda03c10722fbb739c7920b6b9048"><code>acc1df8</code></a> Fix code generation for Name trait (<a href="https://redirect.github.com/tokio-rs/prost/issues/944">#944</a>)</li>
<li><a href="https://github.com/tokio-rs/prost/commit/3cf34f00d3b919ce65cc61fc869feba5aeb487e7"><code>3cf34f0</code></a> prost: prepare release <code>0.12.2</code> (<a href="https://redirect.github.com/tokio-rs/prost/issues/943">#943</a>)</li>
<li><a href="https://github.com/tokio-rs/prost/commit/3ce212ff6107a5f296a082d7be4f0113da8fb887"><code>3ce212f</code></a> feat: Generate implementation for <code>Name</code> trait (<a href="https://redirect.github.com/tokio-rs/prost/issues/931">#931</a>)</li>
<li><a href="https://github.com/tokio-rs/prost/commit/97cd4e29c46f1cac4d27428c759b6bc807c37201"><code>97cd4e2</code></a> fix: generate <code>Name::full_name</code> properly (<a href="https://redirect.github.com/tokio-rs/prost/issues/923">#923</a>)</li>
<li><a href="https://github.com/tokio-rs/prost/commit/9dd655312240ba028660f0c7091a8b9a66406f2a"><code>9dd6553</code></a> release 0.12.1 (<a href="https://redirect.github.com/tokio-rs/prost/issues/918">#918</a>)</li>
<li>See full diff in <a href="https://github.com/tokio-rs/prost/compare/v0.12.1...v0.12.3">compare view</a></li>
</ul>
</details>
<br />


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</details>

packages/proto-build/Cargo.toml

@@ -11,7 +11,7 @@ log = "0.4.20"
 pretty_env_logger = "0.5.0"
 prettyplease = "0.2.15"
 prost = "0.12.3"
-prost-build = "0.12.1"
+prost-build = "0.12.3"
 prost-types = "0.12.3"
 quote = "1.0.33"
 regex = "1"