chore(deps-dev): bump sinon from 8.1.0 to 9.0.0

Bumps [sinon](https://github.com/sinonjs/sinon) from 8.1.0 to 9.0.0.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/master/CHANGELOG.md)
- [Commits](sinonjs/sinon@v8.1.0...v9.0.0)

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

Author: dependabot-preview[bot]

package.json

@@ -18,6 +18,6 @@
     "browserify": "^16.0.0",
     "expect.js": "~0.3.1",
     "mocha": "~6.2.0",
-    "sinon": "8.1.0"
+    "sinon": "9.0.0"
   }
 }