Bump xml2js and brighterscript-jsdocs-plugin

Bumps [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js) to 0.5.0 and updates ancestor dependency [brighterscript-jsdocs-plugin](https://github.com/markwpearce/brighterscript-jsdocs-plugin). These dependencies need to be updated together.


Updates `xml2js` from 0.4.23 to 0.5.0
- [Commits](https://github.com/Leonidas-from-XIV/node-xml2js/commits/0.5.0)

Updates `brighterscript-jsdocs-plugin` from 0.6.0 to 0.7.3
- [Release notes](https://github.com/markwpearce/brighterscript-jsdocs-plugin/releases)
- [Changelog](https://github.com/markwpearce/brighterscript-jsdocs-plugin/blob/master/CHANGELOG.md)
- [Commits](markwpearce/brighterscript-jsdocs-plugin@v0.6.0...v0.7.3)

---
updated-dependencies:
- dependency-name: xml2js
  dependency-type: indirect
- dependency-name: brighterscript-jsdocs-plugin
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -11,7 +11,7 @@
   "devDependencies": {
     "@rokucommunity/bslint": "0.8.22",
     "brighterscript": "0.67.5",
-    "brighterscript-jsdocs-plugin": "0.6.0",
+    "brighterscript-jsdocs-plugin": "0.7.3",
     "clean-jsdoc-theme": "4.3.0",
     "jsdoc": "4.0.3",
     "jshint": "2.13.6",