chore(deps): [Security] Bump lodash from 4.17.15 to 4.17.21#56

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.21. **This update includes security fixes.** <details> <summary>Vulnerabilities fixed</summary> <p><em>Sourced from <a href="https://github.com/advisories/GHSA-p6mc-m468-83gw">The GitHub Security Advisory Database</a>.</em></p> <blockquote> <p><strong>Prototype Pollution in lodash</strong> Versions of lodash prior to 4.17.19 are vulnerable to Prototype Pollution. The function zipObjectDeep allows a malicious user to modify the prototype of Object if the property identifiers are user-supplied. Being affected by this issue requires zipping objects based on user-provided property arrays.</p> <p>This vulnerability causes the addition or modification of an existing property that will exist on all objects and may lead to Denial of Service or Code Execution under specific circumstances.</p> <p>Affected versions: &lt; 4.17.19</p> </blockquote> <p><em>Sourced from <a href="https://github.com/advisories/GHSA-p6mc-m468-83gw">The GitHub Security Advisory Database</a>.</em></p> <blockquote> <p><strong>Prototype Pollution in lodash</strong> Versions of lodash prior to 4.17.19 are vulnerable to Prototype Pollution. The function zipObjectDeep allows a malicious user to modify the prototype of Object if the property identifiers are user-supplied. Being affected by this issue requires zipping objects based on user-provided property arrays.</p> <p>This vulnerability causes the addition or modification of an existing property that will exist on all objects and may lead to Denial of Service or Code Execution under specific circumstances.</p> <p>Affected versions: &lt; 4.17.19</p> </blockquote> <p><em>Sourced from <a href="https://github.com/nodejs/security-wg/blob/master/vuln/npm/516.json">The Node Security Working Group</a>.</em></p> <blockquote> <p><strong>Allocation of Resources Without Limits or Throttling</strong> Prototype pollution attack (lodash)</p> <p>Affected versions: &gt;=4.17.15 &lt;4.17.19</p> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/lodash/lodash/commit/f299b52f39486275a9e6483b60a410e06520c538"><code>f299b52</code></a> Bump to v4.17.21</li> <li><a href="https://github.com/lodash/lodash/commit/c4847ebe7d14540bb28a8b932a9ce1b9ecbfee1a"><code>c4847eb</code></a> Improve performance of <code>toNumber</code>, <code>trim</code> and <code>trimEnd</code> on large input strings</li> <li><a href="https://github.com/lodash/lodash/commit/3469357cff396a26c363f8c1b5a91dde28ba4b1c"><code>3469357</code></a> Prevent command injection through <code>_.template</code>'s <code>variable</code> option</li> <li><a href="https://github.com/lodash/lodash/commit/ded9bc66583ed0b4e3b7dc906206d40757b4a90a"><code>ded9bc6</code></a> Bump to v4.17.20.</li> <li><a href="https://github.com/lodash/lodash/commit/63150ef7645ac07961b63a86490f419f356429aa"><code>63150ef</code></a> Documentation fixes.</li> <li><a href="https://github.com/lodash/lodash/commit/00f0f62a979d2f5fa0287c06eae70cf9a62d8794"><code>00f0f62</code></a> test.js: Remove trailing comma.</li> <li><a href="https://github.com/lodash/lodash/commit/846e434c7a5b5692c55ebf5715ed677b70a32389"><code>846e434</code></a> Temporarily use a custom fork of <code>lodash-cli</code>.</li> <li><a href="https://github.com/lodash/lodash/commit/5d046f39cbd27f573914768e3b36eeefcc4f1229"><code>5d046f3</code></a> Re-enable Travis tests on <code>4.17</code> branch.</li> <li><a href="https://github.com/lodash/lodash/commit/aa816b36d402a1ad9385142ce7188f17dae514fd"><code>aa816b3</code></a> Remove <code>/npm-package</code>.</li> <li><a href="https://github.com/lodash/lodash/commit/d7fbc52ee0466a6d248f047b5d5c3e6d1e099056"><code>d7fbc52</code></a> Bump to v4.17.19</li> <li>Additional commits viewable in <a href="https://github.com/lodash/lodash/compare/4.17.15...4.17.21">compare view</a></li> </ul> </details> <details> <summary>Maintainer changes</summary> <p>This version was pushed to npm by <a href="https://www.npmjs.com/~bnjmnt4n">bnjmnt4n</a>, a new releaser for lodash since your current version.</p> </details> <br /> [](https://dependabot.com/compatibility-score/?dependency-name=lodash&package-manager=npm_and_yarn&previous-version=4.17.15&new-version=4.17.21) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. 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