Summary:
Bumps [tar](https://github.com/npm/node-tar) from 6.1.5 to 6.1.11.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/npm/node-tar/commit/e573aeea19d4d650908b7f6bf0a1ad8dce9f1736"><code>e573aee</code></a> 6.1.11</li>
<li><a href="https://github.com/npm/node-tar/commit/edb8e9a3fa5869cfb935479a262f6f61b0a2ec57"><code>edb8e9a</code></a> fix: perf regression on hot string munging path</li>
<li><a href="https://github.com/npm/node-tar/commit/a9d9b05fc974425089922bf66e8e7751ea8bfbbc"><code>a9d9b05</code></a> chore(test): Avoid spurious failures packing node_modules/.cache</li>
<li><a href="https://github.com/npm/node-tar/commit/24b8bdadf37118182496ecf81fa7a872196fb38b"><code>24b8bda</code></a> fix(test): use posix path for testing path reservations</li>
<li><a href="https://github.com/npm/node-tar/commit/e5a223c6b293f1cb2ebb2dd97668f787e8983ca4"><code>e5a223c</code></a> fix(test): make unpack test pass on case-sensitive fs</li>
<li><a href="https://github.com/npm/node-tar/commit/188baddc1d0e6ef5140c7a788f03fc2a6c3df2ea"><code>188badd</code></a> 6.1.10</li>
<li><a href="https://github.com/npm/node-tar/commit/23312ce7db8a12c78d0fba96d7664a01619266a3"><code>23312ce</code></a> drop dirCache for symlink on all platforms</li>
<li><a href="https://github.com/npm/node-tar/commit/4f1f4a21fca64f3089da0e83ceea775c66b55052"><code>4f1f4a2</code></a> 6.1.9</li>
<li><a href="https://github.com/npm/node-tar/commit/875a37e3ec031186fc6599f6807341f56c584598"><code>875a37e</code></a> fix: prevent path escape using drive-relative paths</li>
<li><a href="https://github.com/npm/node-tar/commit/b6162c7fafe797f856564ef37f4b82747f051455"><code>b6162c7</code></a> fix: reserve paths properly for unicode, windows</li>
<li>Additional commits viewable in <a href="https://github.com/npm/node-tar/compare/v6.1.5...v6.1.11">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebookresearch/mmf/pull/1070

Test Plan:
Imported from GitHub, without a `Test Plan:` line.

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Reviewed By: apsdehal

Differential Revision: D30690090

Pulled By: vedanuj

fbshipit-source-id: 176e05fb9a99fa782b402ec7203f8d61b0e0787b