Bump test262 from 9215420 to e849d40 (#2311)

Bumps [test262](https://github.com/tc39/test262) from `9215420` to `e849d40`.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/tc39/test262/commit/e849d40605dbacb5f0373385c5f64532b61b8c39"><code>e849d40</code></a> CI: Update CircleCI Docker images.</li>
<li><a href="https://github.com/tc39/test262/commit/8565eea8be06eee720b9af42235d1ecf5df0dc5f"><code>8565eea</code></a> Temporal: Test tiebreaker rounding modes more thoroughly</li>
<li><a href="https://github.com/tc39/test262/commit/c84e5701cd54f77cc34acb1916ece27ac72b0222"><code>c84e570</code></a> Temporal: Add tests for new rounding modes</li>
<li><a href="https://github.com/tc39/test262/commit/4155842c37cff7171d9336d9f0cba419b7f59bc5"><code>4155842</code></a> Temporal: Regularize and expand tests for round() rounding modes</li>
<li><a href="https://github.com/tc39/test262/commit/a788188c2f5a8794d9c44d07b73846bcb2e8dcf5"><code>a788188</code></a> Temporal: Regularize and expand tests for difference rounding modes</li>
<li><a href="https://github.com/tc39/test262/commit/9c4aed29b78106725306f5485b97f0ae4634278e"><code>9c4aed2</code></a> Temporal: Remove now-valid rounding modes from roundingmode-invalid-string tests</li>
<li><a href="https://github.com/tc39/test262/commit/e79a1935eddadb56b0211ed867eb2c088d56265f"><code>e79a193</code></a> Add tests for Unicode v15 Identifier{Start,Part} (<a href="https://github-redirect.dependabot.com/tc39/test262/issues/3662">#3662</a>)</li>
<li><a href="https://github.com/tc39/test262/commit/3eaa7c9313e6c8305f12fd538c19eca41f21243d"><code>3eaa7c9</code></a> Update RegExp <code>\p{…}</code> tests per Unicode 15</li>
<li><a href="https://github.com/tc39/test262/commit/ef59ea225a46c17c98b2f4f8fa3585b5190f1316"><code>ef59ea2</code></a> Temporal: Add TemporalHelpers.propertyBagObserver()</li>
<li><a href="https://github.com/tc39/test262/commit/38dd3c28232e2be84d27a3ed9c70ab5982bc37b1"><code>38dd3c2</code></a> Temporal: Consistently format property names in call logs</li>
<li>Additional commits viewable in <a href="https://github.com/tc39/test262/compare/9215420deee3e5887d29f95822bf6a474c1bf728...e849d40605dbacb5f0373385c5f64532b61b8c39">compare view</a></li>
</ul>
</details>
<br />


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 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>