feat: allowed cypress v4 as a valid peer (#119)

closes #118

Author: travi

package.json

@@ -46,12 +46,12 @@
     "@types/testing-library__cypress": "^5.0.2"
   },
   "devDependencies": {
-    "cypress": "^3.8.3",
+    "cypress": "^4.0.0",
     "kcd-scripts": "^5.0.0",
     "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",