chore(deps-dev): update cypress from 3.8.3 to 4.12.1 (#6310)

package.json

@@ -121,7 +121,7 @@
     "cors": "^2.8.5",
     "cross-env": "=7.0.2",
     "css-loader": "^3.5.3",
-    "cypress": "^3.8.3",
+    "cypress": "=4.12.1",
     "dedent": "^0.7.0",
     "deepmerge": "^4.0.0",
     "enzyme": "^2.7.1",