Update mocha-chrome requirement from ^1.1.0 to ^2.0.0

Updates the requirements on [mocha-chrome](https://github.com/shellscape/mocha-chrome) to permit the latest version.
- [Release notes](https://github.com/shellscape/mocha-chrome/releases)
- [Commits](https://github.com/shellscape/mocha-chrome/commits/v2.0.0)

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

package.json

@@ -48,7 +48,7 @@
     "inquirer": "^6.2.1",
     "lerna": "^3.4.3",
     "mocha": "^5.2.0",
-    "mocha-chrome": "^1.1.0",
+    "mocha-chrome": "^2.0.0",
     "node-sass": "^4.9.4",
     "rollup": "^0.68.0",
     "rollup-plugin-babel": "^4.0.3",