Dependency updates (#2253)

* Update dependencies

* Rebuild parse5

* Update version info

* Audit fix

README.md

@@ -335,4 +335,4 @@ versions packaged.
 *   Handlebars: [homepage](https://handlebarsjs.com/) - [snapshot](https://s3.amazonaws.com/builds.handlebarsjs.com/handlebars.min-v4.7.7.js) - [license](https://github.com/handlebars-lang/handlebars.js/blob/v4.7.7/LICENSE)
 *   JSZip: [homepage](https://stuk.github.io/jszip/) - [snapshot](https://github.com/Stuk/jszip/blob/v3.9.1/dist/jszip.min.js) - [license](https://github.com/Stuk/jszip/blob/v3.9.1/LICENSE.markdown)
 *   WanaKana: [homepage](https://wanakana.com/) - [snapshot](https://unpkg.com/wanakana@4.0.2/umd/wanakana.min.js) - [license](https://github.com/WaniKani/WanaKana/blob/4.0.2/LICENSE)
-*   parse5: [homepage](https://github.com/inikulin/parse5) - [snapshot](https://github.com/inikulin/parse5/tree/v7.0.0/packages/parse5) - [license](https://github.com/inikulin/parse5/blob/v7.0.0/LICENSE) _(Only used in MV3 build)_
+*   parse5: [homepage](https://github.com/inikulin/parse5) - [snapshot](https://github.com/inikulin/parse5/tree/v7.1.1/packages/parse5) - [license](https://github.com/inikulin/parse5/blob/v7.1.1/LICENSE) _(Only used in MV3 build)_

ext/legal.html

@@ -119,7 +119,7 @@ <h2><a href="https://github.com/WaniKani/WanaKana/blob/4.0.2/LICENSE" target="_b
     </div></div></div></div></div>
 
     <div data-show-for-manifest-version="3">
-    <h2><a href="https://github.com/inikulin/parse5/blob/v7.0.0/LICENSE" target="_blank" rel="noopener noreferrer">parse5 v7.0.0</a></h2>
+    <h2><a href="https://github.com/inikulin/parse5/blob/v7.1.1/LICENSE" target="_blank" rel="noopener noreferrer">parse5 v7.1.1</a></h2>
     <div class="settings-group"><div class="settings-item"><div class="settings-item-inner"><div class="settings-item-left"><div class="settings-item-label">
 <pre>
 Copyright (c) 2013-2019 Ivan Nikulin (ifaaan@gmail.com, https://github.com/inikulin)