Update p-map in group main to the latest version � (#864)

Summary:
## The dependency [p-map](https://github.com/sindresorhus/p-map) was updated from `3.0.0` to `4.0.0`.
This version is **not covered** by your **current version range**.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

 ---

**Publisher:** [sindresorhus](https://www.npmjs.com/~sindresorhus)
**License:** MIT

<details>
<summary>Release Notes for v4.0.0</summary>

<h3>Breaking</h3>
<ul>
<li>Require Node.js 10  <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="bf03769576/hovercard" href="bf03769576"><tt>bf03769</tt></a></li>
</ul>
<h3>Improvements</h3>
<ul>
<li>Ensure <code>concurrency</code> option is an integer  <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="b342717a9c/hovercard" href="b342717a9c"><tt>b342717</tt></a></li>
</ul>
<p><a class="commit-link" href="https://urls.greenkeeper.io/sindresorhus/p-map/compare/v3.0.0...v4.0.0"><tt>v3.0.0...v4.0.0</tt></a></p>
</details>

<details>
<summary>Commits</summary>
<p>The new version differs by 5 commits.</p>
<ul>
<li><a href="a4b4dec459"><code>a4b4dec</code></a> <code>4.0.0</code></li>
<li><a href="b342717a9c"><code>b342717</code></a> <code>Ensure <code>concurrency</code> is an integer</code></li>
<li><a href="bf03769576"><code>bf03769</code></a> <code>Require Node.js 10</code></li>
<li><a href="f8ccb4e778"><code>f8ccb4e</code></a> <code>Tidelift tasks</code></li>
<li><a href="ed1b661ae9"><code>ed1b661</code></a> <code>Fix test race condition (https://github.com/facebook/flipper/issues/21)</code></li>
</ul>
<p>See the <a href="a8c06732e4...a4b4dec459">full diff</a></p>
</details>

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<details>
  <summary>FAQ and help</summary>

  There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html). If those don’t help, you can always [ask the humans behind Greenkeeper](https://github.com/greenkeeperio/greenkeeper/issues/new).
</details>

 ---

Your [Greenkeeper](https://greenkeeper.io) bot 🌴
Pull Request resolved: https://github.com/facebook/flipper/pull/864

Reviewed By: mweststrate

Differential Revision: D20303306

Pulled By: passy

fbshipit-source-id: 0de6df2e1a9f907c88cad30f70ff35d6af0f328b

package.json

@@ -189,7 +189,7 @@
     "npm-api": "^1.0.0",
     "open": "^7.0.0",
     "openssl-wrapper": "^0.3.4",
-    "p-map": "^3.0.0",
+    "p-map": "^4.0.0",
     "patch-package": "^6.2.0",
     "pkg": "^4.4.1",
     "promise-retry": "^1.1.1",

yarn.lock

@@ -8050,10 +8050,10 @@ p-locate@^4.1.0:
   dependencies:
     p-limit "^2.2.0"
 
-p-map@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/p-map/-/p-map-3.0.0.tgz#d704d9af8a2ba684e2600d9a215983d4141a979d"
-  integrity sha512-d3qXVTF/s+W+CdJ5A29wywV2n8CQQYahlgz2bFiA+4eVNJbHJodPZ+/gXwPGh0bOqA+j8S+6+ckmvLGPk1QpxQ==
+p-map@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/p-map/-/p-map-4.0.0.tgz#bb2f95a5eda2ec168ec9274e06a747c3e2904d2b"
+  integrity sha512-/bjOqmgETBYB5BoEeGVea8dmvHb2m9GLy1E9W43yeyfP6QQCZGFNa+XRceJEuDB6zqr+gKpIAmlLebMpykw/MQ==
   dependencies:
     aggregate-error "^3.0.0"