[HOLD] Upgrade Savage

[Blackbaud-PatrickOFriel]

Look at upgrading Savage for some security benefits

[Blackbaud-SteveBrush]

This PR will need to be merged in before we can complete this request: twbs/savage#55

[Blackbaud-SteveBrush]

@Blackbaud-BobbyEarl You provided a comment on the referenced PR (on twbs/savage). Curious if you have an update?

[Blackbaud-BobbyEarl]

No update. Would be nice to eventually address this (by helping with the original PR), but unfortunately it seems to be a low priority for all parties involved.

[Blackbaud-AlexKingman]

WIP to use a bot framework instead of Savage.