Bump mixin-deep from 1.3.1 to 1.3.2 in /examples/draft-0-10-0/playgro…

…und (#2235)

Summary:
Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.1 to 1.3.2.
<details>
<summary>Commits</summary>

- [`754f0c2`](jonschlinkert/mixin-deep@754f0c2) 1.3.2
- [`90ee1fa`](jonschlinkert/mixin-deep@90ee1fa) ensure keys are valid when mixing in values
- See full diff in [compare view](jonschlinkert/mixin-deep@1.3.1...1.3.2)
</details>
<details>
<summary>Maintainer changes</summary>

This version was pushed to npm by [doowb](https://www.npmjs.com/~doowb), a new releaser for mixin-deep since your current version.
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=mixin-deep&package-manager=npm_and_yarn&previous-version=1.3.1&new-version=1.3.2)](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: facebookarchive/draft-js#2235

Reviewed By: elboman

Differential Revision: D18220753

Pulled By: mrkev

fbshipit-source-id: 8fe07baacaa11932c1ffa75dab1121f7974c7f07