Bump ms and mocha

Bumps [ms](https://github.com/vercel/ms) to 2.0.0 and updates ancestor dependency [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Updates `ms` from 0.7.1 to 2.0.0
- [Release notes](https://github.com/vercel/ms/releases)
- [Commits](vercel/ms@0.7.1...2.0.0)

Updates `mocha` from 3.2.0 to 3.5.3
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/v3.5.3/CHANGELOG.md)
- [Commits](mochajs/mocha@v3.2.0...v3.5.3)

---
updated-dependencies:
- dependency-name: ms
  dependency-type: indirect
- dependency-name: mocha
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "karma-sinon": "1.0.5",
     "karma-spec-reporter": "0.0.26",
     "mkdirp": "0.5.1",
-    "mocha": "3.2.0",
+    "mocha": "3.5.3",
     "phantomjs-prebuilt": "2.1.14",
     "rimraf": "2.5.4",
     "rollup": "0.41.1",