feat: update cypress to v6 (#6120)

Author: haoqunjiang

docs/migrations/migrate-from-v4.md

@@ -104,7 +104,7 @@ Please consider switching to ESLint. You can check out [`tslint-to-eslint-config
 ### E2E-Cypress Plugin
 
 * Cypress is required as a peer dependency.
-* Cypress is updated from v3 to v5. See [Cypress Migration Guide](https://docs.cypress.io/guides/references/migration-guide.html) for detailed instructions of the migration process.
+* Cypress is updated from v3 to v6. See [Cypress Migration Guide](https://docs.cypress.io/guides/references/migration-guide.html) for detailed instructions of the migration process.
 
 ### Unit-Jest Plugin
 

packages/@vue/cli-plugin-e2e-cypress/package.json

@@ -24,8 +24,8 @@
   },
   "dependencies": {
     "@vue/cli-shared-utils": "^4.5.8",
-    "cypress": "^5.2.0",
-    "eslint-plugin-cypress": "^2.10.3"
+    "cypress": "^6.1.0",
+    "eslint-plugin-cypress": "^2.11.2"
   },
   "peerDependencies": {
     "@vue/cli-service": "^3.0.0 || ^4.0.0-0"