Update rails version and dependencies (#286)
Update rails version and dependencies (#286)

There are vulnerabilities in `actionview`, `actionpack` and
`rails-html-sanitizer` that require an update to rails to fix.

Co-authored-by: James Miller <dda963b25c89983703d585f5b5af56e585d4e22d@reannz.co.nz>
ausaccessfed/saml-service,ausaccessfed/saml-service,ausaccessfed/saml-service,ausaccessfed/saml-service