chore(package): update mocha to version 7.0.1

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "chai": "^4.1.2",
     "jest": "^23.5.0",
     "jest-fetch-mock": "^3.0.0",
-    "mocha": "^6.0.0",
+    "mocha": "^7.0.1",
     "nock": "^11.3.5",
     "prettier": "^1.14.2",
     "rimraf": "^3.0.0",