fix(deps): Bump @grpc/proto-loader from 0.7.10 to 0.7.12 (#476)

Bumps [@grpc/proto-loader](https://github.com/grpc/grpc-node) from 0.7.10 to 0.7.12.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/grpc/grpc-node/releases"><code>@​grpc/proto-loader</code>'s releases</a>.</em></p>
<blockquote>
<h2><code>@​grpc/proto-loader</code> 0.7.12</h2>
<ul>
<li>Revert &quot;Use a <code>.ts</code> extension in import statements in generated TypeScript files&quot; (<a href="https://redirect.github.com/grpc/grpc-node/issues/2699">#2699</a>)</li>
</ul>
<h2><code>@​grpc/proto-loader</code> 0.7.11</h2>
<ul>
<li>Use a <code>.ts</code> extension in import statements in generated TypeScript files (<a href="https://redirect.github.com/grpc/grpc-node/issues/2693">#2693</a> contributed by <a href="https://github.com/atjn"><code>@​atjn</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/grpc/grpc-node/commit/dfd8f0f7ea4188cf8be1aabd9a494fcd287debe5"><code>dfd8f0f</code></a> Merge pull request <a href="https://redirect.github.com/grpc/grpc-node/issues/2699">#2699</a> from murgatroid99/proto-loader_revert_extension</li>
<li><a href="https://github.com/grpc/grpc-node/commit/d3e16a43ea7074ab9d2ca6103cbdba30e67d006b"><code>d3e16a4</code></a> proto-loader: Revert 'Import internal files with extension'</li>
<li><a href="https://github.com/grpc/grpc-node/commit/6f5a955d8c938198442c53c39946b6e4ae3f1f50"><code>6f5a955</code></a> Merge pull request <a href="https://redirect.github.com/grpc/grpc-node/issues/2697">#2697</a> from murgatroid99/example_interceptors</li>
<li><a href="https://github.com/grpc/grpc-node/commit/f2c5facba6d2c2e2363b30eff10adb5ff6fbc404"><code>f2c5fac</code></a> Merge pull request <a href="https://redirect.github.com/grpc/grpc-node/issues/2698">#2698</a> from murgatroid99/proto-loader_0.7.11</li>
<li><a href="https://github.com/grpc/grpc-node/commit/eccccd9e8c4db4a4dd04849b90036e06027c874f"><code>eccccd9</code></a> proto-loader: Bump version to 0.7.11</li>
<li><a href="https://github.com/grpc/grpc-node/commit/d9c26724a5c85e33f56510600f054856850de7df"><code>d9c2672</code></a> Merge pull request <a href="https://redirect.github.com/grpc/grpc-node/issues/2693">#2693</a> from atjn/import-extension</li>
<li><a href="https://github.com/grpc/grpc-node/commit/055282a14073d6738795ba77cc59268234aaec57"><code>055282a</code></a> Update docs with recommended import method</li>
<li><a href="https://github.com/grpc/grpc-node/commit/8d69e9fa7afff81fc9ecc9f618f0bda3972ba735"><code>8d69e9f</code></a> Fix tests</li>
<li><a href="https://github.com/grpc/grpc-node/commit/443992bd04031bdbb9a2d6d9adcfcdbb48ddac98"><code>443992b</code></a> Add interceptors example</li>
<li><a href="https://github.com/grpc/grpc-node/commit/83d9f1c8b9c6585382564d4643e878ee98378891"><code>83d9f1c</code></a> Import files with extension</li>
<li>Additional commits viewable in <a href="https://github.com/grpc/grpc-node/compare/@grpc/[email protected]...@grpc/[email protected]">compare view</a></li>
</ul>
</details>
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</details>

package.json

@@ -64,7 +64,7 @@
   },
   "dependencies": {
     "@grpc/grpc-js": "< 2",
-    "@grpc/proto-loader": "^0.7.10",
+    "@grpc/proto-loader": "^0.7.12",
     "@relaycorp/relaynet-core": ">= 1.81.4 < 2",
     "check-ip": "^1.1.1",
     "it-pipe": "^1.1.0",