Bump tslib from 2.7.0 to 2.8.0 (#387)

Bumps [tslib](https://github.com/Microsoft/tslib) from 2.7.0 to 2.8.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/Microsoft/tslib/releases">tslib's
releases</a>.</em></p>
<blockquote>
<h2>v2.8.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Validate export structure of every entrypoint by <a
href="https://github.com/andrewbranch"><code>@​andrewbranch</code></a>
in <a
href="https://redirect.github.com/microsoft/tslib/pull/269">microsoft/tslib#269</a></li>
<li>Add rewriteRelativeImportExtension helper by <a
href="https://github.com/andrewbranch"><code>@​andrewbranch</code></a>
in <a
href="https://redirect.github.com/microsoft/tslib/pull/270">microsoft/tslib#270</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/microsoft/tslib/compare/v2.7.0...v2.8.0">https://github.com/microsoft/tslib/compare/v2.7.0...v2.8.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/microsoft/tslib/commit/ca5f7fb791f85ebf17c0102cdc632e9577b3e483"><code>ca5f7fb</code></a>
2.8.0</li>
<li><a
href="https://github.com/microsoft/tslib/commit/2334267563070369fec24e1c29f2abd448ec0a16"><code>2334267</code></a>
Merge pull request <a
href="https://redirect.github.com/Microsoft/tslib/issues/270">#270</a>
from microsoft/rewriteRelativeImportExtension</li>
<li><a
href="https://github.com/microsoft/tslib/commit/c4cde745896b4d845a11dc5aeb72405074c9a0c5"><code>c4cde74</code></a>
Missed update</li>
<li><a
href="https://github.com/microsoft/tslib/commit/27b219209a4d35308e9dd6a533e5169a981d2614"><code>27b2192</code></a>
Little optimizations</li>
<li><a
href="https://github.com/microsoft/tslib/commit/fece22a6b42e378abcf7dfbefaa89b62e0b814f8"><code>fece22a</code></a>
Add URL-ish test</li>
<li><a
href="https://github.com/microsoft/tslib/commit/9c731e9f325b1e8341c8fbc3a7ca572cc792f15b"><code>9c731e9</code></a>
Combine tsx case into regex</li>
<li><a
href="https://github.com/microsoft/tslib/commit/1c03288ab27b787dc4cc3bc9e002c7d3d1a27815"><code>1c03288</code></a>
Test and fix invalid declaration-looking extensions</li>
<li><a
href="https://github.com/microsoft/tslib/commit/a55e9f7a805d9aa489fe29f7acb59fdc19f09472"><code>a55e9f7</code></a>
Do more with a regex</li>
<li><a
href="https://github.com/microsoft/tslib/commit/e828dac33c7721a8ab16a37200dfb6101958d351"><code>e828dac</code></a>
Shorten by one line</li>
<li><a
href="https://github.com/microsoft/tslib/commit/e7b6aa0a882601b7352edfb3799c92d85006aaab"><code>e7b6aa0</code></a>
Case insensitivity, remove lookbehind</li>
<li>Additional commits viewable in <a
href="https://github.com/Microsoft/tslib/compare/v2.7.0...v2.8.0">compare
view</a></li>
</ul>
</details>
<br />


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package.json

@@ -37,7 +37,7 @@
     "core-js": "3.38.1",
     "oidc-client-ts": "3.1.0",
     "rxjs": "7.8.1",
-    "tslib": "2.7.0",
+    "tslib": "2.8.0",
     "zone.js": "0.14.10"
   },
   "devDependencies": {