Upgrade vulnerable gems
Upgrade vulnerable gems

Fixes for the following issues:

* CVE-2018-3740 - HTML INJECTION/XS
* CVE-2018-3741 - XSS VULNERABILITYS
* CVE-2018-8048 - XSS VULNERABILITY
ministryofjustice/tax-tribunals-datacapture,ministryofjustice/tax-tribunals-datacapture,ministryofjustice/tax-tribunals-datacapture,ministryofjustice/tax-tribunals-datacapture