Bump ms and hubot

Bumps [ms](https://github.com/vercel/ms) to 2.0.0 and updates ancestor dependency hubot. 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](https://github.com/vercel/ms/compare/0.7.1...2.0.0)

Updates `hubot` from 2.19.0 to 3.4.0

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

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

package.json

@@ -22,14 +22,14 @@
     "parent-require": "^1.0.0"
   },
   "peerDependencies": {
-    "hubot": "^2.19.0"
+    "hubot": "^3.4.0"
   },
   "devDependencies": {
     "chai": "^4.1.1",
     "coffee-coverage": "^2.0.1",
     "coffee-script": ">=1.2.0",
     "coveralls": "^2.13.1",
-    "hubot": "^2.19.0",
+    "hubot": "^3.4.0",
     "istanbul": "^0.4.5",
     "mocha": "^3.5.0",
     "mocha-lcov-reporter": "^1.3.0",