Merge pull request #252 from web-push-libs/pin_selenium-related_packages

Pin some Selenium-related packages to versions that were definitely working

Author: marco-c

package.json

@@ -37,18 +37,18 @@
   },
   "devDependencies": {
     "chalk": "^1.1.3",
-    "chromedriver": "^2.24.1",
+    "chromedriver": "2.24.1",
     "del": "^2.2.1",
     "eslint": "^3.5.0",
     "eslint-config-airbnb": "^11.1.0",
     "eslint-plugin-import": "^1.16.0",
-    "geckodriver": "^1.1.2",
+    "geckodriver": "1.1.3",
     "istanbul": "^0.4.2",
     "mkdirp": "^0.5.1",
     "mocha": "^3.0.2",
     "portfinder": "^1.0.2",
-    "selenium-assistant": "^1.0.0",
-    "selenium-webdriver": "^3.0.0-beta-2",
+    "selenium-assistant": "1.0.0",
+    "selenium-webdriver": "3.0.0-beta-2",
     "semver": "^5.1.0",
     "which": "^1.2.11"
   },