chore(package): update should to version 13.2.3

Closes #324

Author: greenkeeper[bot]

package.json

@@ -76,7 +76,7 @@
     "mocha": ">=4.1.0",
     "script-loader": "^0.7.0",
     "selenium-standalone": "6.14.0",
-    "should": "13.2.1",
+    "should": "13.2.3",
     "supertest": "*",
     "wdio-concise-reporter": "^0.1.2",
     "wdio-dot-reporter": "0.0.9",