chore(package): update @types/nock to version 9.1.0 (#378)

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
  "@types/mkdirp": "^0.5.1",
  "@types/mocha": "^2.2.41",
  "@types/ncp": "^2.0.1",
- "@types/nock": "^8.2.1",
+ "@types/nock": "^9.1.0",
  "@types/node": "^8.0.27",
  "@types/once": "^1.4.0",
  "@types/pify": "^3.0.0",