housekeeping: bump minimum Cypress version (via #5233)

* Update Cypress version

* regenerate package-lock.json

Author: hkosova

package-lock.json

@@ -102,7 +102,7 @@
     "copy-webpack-plugin": "^4.0.1",
     "cors": "^2.8.4",
     "css-loader": "^0.28.11",
-    "cypress": "^3.1.0",
+    "cypress": "^3.1.5",
     "dedent": "^0.7.0",
     "deepmerge": "^2.1.0",
     "enzyme": "^2.7.1",