Bump sinon from 9.2.1 to 9.2.2

Bumps [sinon](https://github.com/sinonjs/sinon) from 9.2.1 to 9.2.2.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sinonjs/sinon/commits/v9.2.2)

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

package.json

@@ -33,7 +33,7 @@
     "mocha": "^5.2.0",
     "mocha-webpack": "^2.0.0-beta.0",
     "nyc": "^15.1.0",
-    "sinon": "^9.2.1",
+    "sinon": "^9.2.2",
     "url-loader": "^4.1.1",
     "vue-loader": "^15.9.5",
     "vue-template-compiler": "^2.6.12",