Bump xmldom from 0.3.0 to 0.5.0 (#5)

Bumps [xmldom](https://github.com/xmldom/xmldom) from 0.3.0 to 0.5.0.
- [Release notes](https://github.com/xmldom/xmldom/releases)
- [Changelog](https://github.com/xmldom/xmldom/blob/master/CHANGELOG.md)
- [Commits](xmldom/xmldom@0.3.0...0.5.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -172,7 +172,7 @@
     "web-ext": "^4.2.0",
     "webpack": "^4.43.0",
     "ws": "^7.2.5",
-    "xmldom": "^0.3.0"
+    "xmldom": "^0.5.0"
   },
   "homepage": "https://github.com/cliqz/navigation-extension#readme",
   "repository": {