fix: allowed cypress v4 as a valid peer

closes #118

Author: travi

package.json

@@ -51,7 +51,7 @@
     "npm-run-all": "^4.1.5"
   },
   "peerDependencies": {
-    "cypress": "^2.1.0 || ^3.0.0"
+    "cypress": "^2.1.0 || ^3.0.0 || ^4.0.0"
   },
   "eslintConfig": {
     "extends": "./node_modules/kcd-scripts/eslint.js",