Update some dev dependencies

package.json

@@ -25,7 +25,7 @@
   "license": "Apache-2.0",
   "private": true,
   "devDependencies": {
-    "eslint": "^5.4.0",
+    "eslint": "^5.8.0",
     "google-closure-compiler": "^20180805.0.0",
     "google-closure-library": "^20180805.0.0",
     "gulp": "^3.9.1",
@@ -34,7 +34,7 @@
     "gulp-series": "^1.0.2",
     "gulp-shell": "^0.6.5",
     "jshint": "^2.9.5",
-    "webdriverio": "^4.13.2"
+    "webdriverio": "^4.14.0"
   },
   "jshintConfig": {
     "globalstrict": true,