Merge pull request #72 from getconversio/hotfix/fix-vulnerabilities

Fix vulnerabilities

Author: stefanosala

package.json

@@ -5,7 +5,7 @@
   "main": "./lib/bigcommerce",
   "scripts": {
     "autotest": "node_modules/.bin/supervisor -q -n exit -x node_modules/.bin/_mocha --",
-    "exectests": "node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha",
+    "exectests": "node_modules/.bin/nyc ./node_modules/.bin/_mocha",
     "lint": "node_modules/.bin/eslint lib test",
     "test": "npm run exectests && npm run lint"
   },
@@ -32,9 +32,9 @@
     "chai": "^3.5.0",
     "eslint": "^4.9.0",
     "eslint-config-conversio": "^1.0.4",
-    "istanbul": "^0.4.2",
-    "mocha": "^2.4.5",
+    "mocha": "^6.1.4",
     "nock": "^10.0.1",
+    "nyc": "^14.1.1",
     "sinon": "^1.17.3",
     "supervisor": "^0.12.0"
   },