Bump xmldom from 0.3.0 to 0.6.0 in /extensions/sql-database-projects (#18171)

Bumps [xmldom](https://github.com/xmldom/xmldom) from 0.3.0 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/0.3.0...0.6.0)

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

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extensions/sql-database-projects/package.json

@@ -454,7 +454,7 @@
     "vscode-nls": "^4.1.2",
     "which": "^2.0.2",
     "xml-formatter": "^2.1.0",
-    "xmldom": "^0.3.0"
+    "xmldom": "^0.6.0"
   },
   "devDependencies": {
     "@types/fs-extra": "^5.0.0",