chore(deps): bump @relaycorp/shared-config from 1.8.0 to 1.9.1 (#137)

Bumps [@relaycorp/shared-config](https://github.com/relaycorp/shared-config) from 1.8.0 to 1.9.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/relaycorp/shared-config/releases"><code>@​relaycorp/shared-config</code>'s releases</a>.</em></p>
<blockquote>
<h2>v1.9.1</h2>
<h2><a href="https://github.com/relaycorp/shared-config/compare/v1.9.0...v1.9.1">1.9.1</a> (2022-07-18)</h2>
<h3>Bug Fixes</h3>
<ul>
<li><strong>tsconfig:</strong> Revert use of ESM (ES2020) (<a href="https://github.com/relaycorp/shared-config/commit/094465a3cd5460b559c0b535fe5e23c2ab9df34c">094465a</a>)</li>
</ul>
<h2>v1.9.0</h2>
<h1><a href="https://github.com/relaycorp/shared-config/compare/v1.8.0...v1.9.0">1.9.0</a> (2022-06-21)</h1>
<h3>Features</h3>
<ul>
<li><strong>tsconfig:</strong> Use ESM (ES2020) (<a href="https://github.com/relaycorp/shared-config/commit/cb6605c1ee449696394d555d3f5d073759d58335">cb6605c</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/relaycorp/shared-config/commit/094465a3cd5460b559c0b535fe5e23c2ab9df34c"><code>094465a</code></a> fix(tsconfig): Revert use of ESM (ES2020)</li>
<li><a href="https://github.com/relaycorp/shared-config/commit/cb6605c1ee449696394d555d3f5d073759d58335"><code>cb6605c</code></a> feat(tsconfig): Use ESM (ES2020)</li>
<li>See full diff in <a href="https://github.com/relaycorp/shared-config/compare/v1.8.0...v1.9.1">compare view</a></li>
</ul>
</details>
<br />


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</details>

package.json

@@ -43,7 +43,7 @@
     "pino": "^8.1.0"
   },
   "devDependencies": {
-    "@relaycorp/shared-config": "^1.8.0",
+    "@relaycorp/shared-config": "^1.9.1",
     "@types/jest": "^27.5.0",
     "del-cli": "^4.0.1",
     "jest": "^24.9.0",