Bump xmldom from 0.1.31 to 0.6.0 (#125)

Bumps [xmldom](https://github.com/xmldom/xmldom) from 0.1.31 to 0.6.0.
- [Release notes](https://github.com/xmldom/xmldom/releases)
- [Changelog](https://github.com/xmldom/xmldom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/xmldom/xmldom/compare/v0.1.31...0.6.0)

---
updated-dependencies:
- dependency-name: xmldom
  dependency-type: direct:production
...

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package.json

@@ -435,7 +435,7 @@
         "vscode-debugprotocol": "1.40.0",
         "vscode-languageclient": "6.1.3",
         "ws": "7.3.0",
-        "xmldom": "0.1.31",
+        "xmldom": "0.6.0",
         "xpath": "0.0.27"
     },
     "devDependencies": {