Bump govuk-frontend to 6.0.0-rc.0

Author: 36degrees

package-lock.json

@@ -12,10 +12,9 @@
     "check-links": "hyperlink --canonicalroot https://frontend.design-system.service.gov.uk --internal --recursive build/index.html --skip 'property=\"og:image\"' | tee check-links.log | tap-mocha-reporter min"
   },
   "devDependencies": {
-
-    "govuk-frontend": "^6.0.0-beta.2",
-    "govuk-frontend-v5": "npm:govuk-frontend@^5.14.0",
+    "govuk-frontend": "^6.0.0-rc.0",
     "govuk-frontend-v4": "npm:govuk-frontend@^4.10.1",
+    "govuk-frontend-v5": "npm:govuk-frontend@^5.14.0",
     "hyperlink": "^5.0.4",
     "sassdoc": "^2.7.4",
     "standard": "^17.1.2",