Bump ignore from 0.4.17 to 0.4.18 in /packer (#2447)

Summary:
Bumps [ignore](https://github.com/BurntSushi/ripgrep) from 0.4.17 to 0.4.18.
<details>
<summary>Commits</summary>
<ul>
<li><a href="14860b0f16"><code>14860b0</code></a> ignore-0.4.18</li>
<li><a href="0eb1a1e7c9"><code>0eb1a1e</code></a> deps/globset: update minimal versions</li>
<li><a href="5631e5c7a0"><code>5631e5c</code></a> globset-0.4.7</li>
<li><a href="0ee85a89f5"><code>0ee85a8</code></a> deps: update to memmap2</li>
<li><a href="e824531e38"><code>e824531</code></a> edition: manual changes</li>
<li><a href="af54069c51"><code>af54069</code></a> edition: run 'cargo fix --edition --edition-idioms --all'</li>
<li><a href="77a9e99964"><code>77a9e99</code></a> edition: set edition=2018</li>
<li><a href="459a9c5637"><code>459a9c5</code></a> edition: initial 'cargo fix --edition' run</li>
<li><a href="5d0f2b0fc0"><code>5d0f2b0</code></a> ignore/types: config.ru and *.rbw Ruby</li>
<li><a href="fbb2cfed28"><code>fbb2cfe</code></a> printer: trim line terminator before doing replacements</li>
<li>Additional commits viewable in <a href="https://github.com/BurntSushi/ripgrep/compare/ignore-0.4.17...ignore-0.4.18">compare view</a></li>
</ul>
</details>
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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/2447

Reviewed By: jknoxville

Differential Revision: D29129139

Pulled By: passy

fbshipit-source-id: 574eb73e23613617703c9617d56c34a3f24db1e3

packer/Cargo.toml

@@ -22,7 +22,7 @@ serde_json = "1.0.64"
 rayon = "1.5.1"
 indicatif = "^0.15"
 xz2 = "0.1.6"
-ignore = "^0.4.17"
+ignore = "^0.4.18"
 
 [dev-dependencies]
 tempdir = "0.3.7"