Fix security alerts, switches to release-it

Switches to release-it from grunt-release
Fixes https://nvd.nist.gov/vuln/detail/CVE-2017-16118
Fixes https://nvd.nist.gov/vuln/detail/CVE-2017-16119
Fixes https://nvd.nist.gov/vuln/detail/CVE-2017-16136
Fixes https://nvd.nist.gov/vuln/detail/CVE-2017-16138
Fixes https://nvd.nist.gov/vuln/detail/CVE-2017-16129

Note: Does not address CVE-2017-16137 because knox has not been updated in quite some time. Solution there is most likely to swap out for the standard AWS library.

stephenyeargin / hubot-grafana

Fix security alerts, switches to release-it #83