Bump simplesmtp version
Bump simplesmtp version

This is to fix some failing tests. It's a dirty hack, since simplesmtp
is obsolete, but it'll work for now while we have bigger issues.

stephensekula/pump.io,stephensekula/pump.io,e14n/pump.io,pump-io/pump.io,e14n/pump.io,pump-io/pump.io,stephensekula/pump.io,profOnno/pump.io,e14n/pump.io,pump-io/pump.io,profOnno/pump.io