build(deps): bump tslib from 2.7.0 to 2.8.0 (#477)

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 />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=tslib&package-manager=npm_and_yarn&previous-version=2.7.0&new-version=2.8.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>