Update dependency cypress to v3.8.0

Author: renovate-bot

package.json

@@ -48,7 +48,7 @@
     "concurrently": "3.6.0",
     "cpx": "1.5.0",
     "cpy-cli": "2.0.0",
-    "cypress": "3.0.2",
+    "cypress": "3.8.0",
     "gh-pages": "1.2.0",
     "light-ts-loader": "1.1.2",
     "npm-run-all": "4.1.3",