Snyk reports vulnerability for version 2.4.4

Hi,

We are using Galen Framework 2.4.4 and upon scanning using Snyk we found there is a vulnerability induced through the freemarker library. 

Snyk recommends -> Upgrade org.freemarker:freemarker to version 2.3.30 or higher to remediate this.

We understand Galen uses Freemarker 2.3.19, hence the request to upgrade.

