Bump cypress from 5.6.0 to 6.8.0

Bumps [cypress](https://github.com/cypress-io/cypress) from 5.6.0 to 6.8.0.
- [Release notes](https://github.com/cypress-io/cypress/releases)
- [Changelog](https://github.com/cypress-io/cypress/blob/develop/.releaserc.base.js)
- [Commits](https://github.com/cypress-io/cypress/compare/@cypress/webpack-preprocessor-v5.6.0...v6.8.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -23,7 +23,7 @@
     "@vue/compiler-sfc": "^3.0.2",
     "@vue/eslint-config-standard": "^5.1.2",
     "@vue/eslint-config-typescript": "^7.0.0",
-    "cypress": "^5.6.0",
+    "cypress": "^6.8.0",
     "eslint": "^7.13.0",
     "eslint-plugin-vue": "^7.1.0",
     "typescript": "^4.0.5",