Bump lodash.merge from 4.6.1 to 4.6.2 in /website (#2241)

Summary:
Bumps [lodash.merge](https://github.com/lodash/lodash) from 4.6.1 to 4.6.2.
<details>
<summary>Commits</summary>

- See full diff in [compare view](https://github.com/lodash/lodash/commits)
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=lodash.merge&package-manager=npm_and_yarn&previous-version=4.6.1&new-version=4.6.2)](https://help.github.com/articles/configuring-automated-security-fixes)

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 ignore this [patch|minor|major] version` will close this PR and stop Dependabot creating any more for this minor/major 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)
- `dependabot use these labels` will set the current labels as the default for future PRs for this repo and language
- `dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language
- `dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language
- `dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language

You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/facebook/draft-js/network/alerts).

</details>
Pull Request resolved: #2241

Differential Revision: D18247607

Pulled By: mrkev

fbshipit-source-id: 919f2304d20638cdab7455b39bee3feed5a94071

website/yarn.lock

@@ -3498,9 +3498,9 @@ lodash.memoize@^4.1.2:
   integrity sha1-vMbEmkKihA7Zl/Mj6tpezRguC/4=
 
 lodash.merge@^4.4.0:
-  version "4.6.1"
-  resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.1.tgz#adc25d9cb99b9391c59624f379fbba60d7111d54"
-  integrity sha512-AOYza4+Hf5z1/0Hztxpm2/xiPZgi/cjMqdnKTUWTBSKchJlxXXuUSxCCl8rJlf4g6yww/j6mA8nC8Hw/EZWxKQ==
+  version "4.6.2"
+  resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
+  integrity sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==
 
 lodash.pick@^4.2.1:
   version "4.4.0"