Bump @xmldom/xmldom from 0.8.3 to 0.8.4 (#156)

Bumps [@xmldom/xmldom](https://github.com/xmldom/xmldom) from 0.8.3 to 0.8.4.
- [Release notes](https://github.com/xmldom/xmldom/releases)
- [Changelog](https://github.com/xmldom/xmldom/blob/master/CHANGELOG.md)
- [Commits](xmldom/xmldom@0.8.3...0.8.4)

---
updated-dependencies:
- dependency-name: "@xmldom/xmldom"
  dependency-type: direct:production
...

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

package.json

@@ -13,7 +13,7 @@
     "os": "^0.1.1",
     "path": "^0.12.7",
     "xml-formatter": "^2.4.0",
-    "@xmldom/xmldom": "^0.8.3"
+    "@xmldom/xmldom": "^0.8.4"
   },
   "devDependencies": {
     "@zeit/ncc": "^0.20.5",