Bump yargs-parser and postcss-purgecss

Removes [yargs-parser](https://github.com/yargs/yargs-parser). It's no longer used after updating ancestor dependency [postcss-purgecss](https://github.com/FullHuman/purgecss). These dependencies need to be updated together.


Removes `yargs-parser`

Updates `postcss-purgecss` from 1.0.0 to 2.0.3
- [Release notes](https://github.com/FullHuman/purgecss/releases)
- [Changelog](https://github.com/FullHuman/purgecss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/FullHuman/purgecss/compare/1.0.0...v2.0.3)

---
updated-dependencies:
- dependency-name: yargs-parser
  dependency-type: indirect
- dependency-name: postcss-purgecss
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -22,7 +22,7 @@
     "jquery": "^3.6.0",
     "jquery-mask-plugin": "^1.14.16",
     "postcss": "^8.4.12",
-    "postcss-purgecss": "^1.0.0"
+    "postcss-purgecss": "^2.0.3"
   },
   "devDependencies": {
     "husky": "^8.0.1",