fixed npm audit issues

Author: John Doherty

package.json

@@ -1,6 +1,6 @@
 {
   "name": "selenium-cucumber-js",
-  "version": "1.6.2",
+  "version": "1.7.0",
   "description": "JavaScript browser automation framework using official selenium-webdriver and cucumber-js",
   "main": "index.js",
   "scripts": {
@@ -45,14 +45,14 @@
     "cucumber": "1.3.3",
     "cucumber-html-reporter": "4.0.4",
     "cucumber-junit": "1.6.0",
-    "electron": "^1.7.6",
+    "electron": "^1.8.8",
     "electron-chromedriver": "^1.7.1",
     "electron-packager": "^9.1.0",
     "electron-prebuilt": "^1.4.13",
     "eyes.selenium": "0.0.72",
     "fs-plus": "2.9.1",
-    "geckodriver": "^1.12.2",
-    "merge": "1.2.0",
+    "geckodriver": "^1.16.2",
+    "merge": "^1.2.1",
     "phantomjs-prebuilt": "2.1.12",
     "require-dir": "0.3.2",
     "selenium-webdriver": "3.5.0"