chore(deps-dev): bump @types/ws from 6.0.4 to 7.2.1 (ionic-team#204)

Bumps [@types/ws](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/ws) from 6.0.4 to 7.2.1.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/ws)

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

package.json

@@ -46,7 +46,7 @@
     "@types/node": "^8.10.34",
     "@types/webpack": "^4.4.14",
     "@types/webpack-dev-server": "^3.1.1",
-    "@types/ws": "^6.0.1",
+    "@types/ws": "^7.2.1",
     "commitizen": "^4.0.3",
     "cz-conventional-changelog": "^3.1.0",
     "husky": "^4.0.10",