Recommended fix for https://nvd.nist.gov/vuln/detail/CVE-2018-17567
Recommended fix for https://nvd.nist.gov/vuln/detail/CVE-2018-17567

We've recently turned on [Security
Alerts](https://github.blog/2017-11-16-introducing-security-alerts-on-github/) and found this alert marked as
moderate severity. This change takes the recommendation to update to this
verision of jekyll.

Signed-off-by: Tom Krouper <14321fe1d8c093d610e07e1013da2c822bb0c637@github.com>

HubSpot/vitess,HubSpot/vitess,davygeek/vitess,tinyspeck/vitess,vitessio/vitess,mahak/vitess,HubSpot/vitess,mahak/vitess,dcadevil/vitess,HubSpot/vitess,dcadevil/vitess,enisoc/vitess,vitessio/vitess,mahak/vitess,enisoc/vitess,tinyspeck/vitess,vitessio/vitess,davygeek/vitess,tinyspeck/vitess,tinyspeck/vitess,enisoc/vitess,vitessio/vitess,vitessio/vitess,tinyspeck/vitess,dcadevil/vitess,mahak/vitess,enisoc/vitess,HubSpot/vitess,davygeek/vitess,HubSpot/vitess,davygeek/vitess,mahak/vitess,mahak/vitess,HubSpot/vitess,mahak/vitess,enisoc/vitess,HubSpot/vitess,enisoc/vitess,mahak/vitess,vitessio/vitess,davygeek/vitess,davygeek/vitess,dcadevil/vitess,dcadevil/vitess,tinyspeck/vitess,dcadevil/vitess,davygeek/vitess,tinyspeck/vitess,vitessio/vitess,enisoc/vitess,vitessio/vitess,dcadevil/vitess