upgrade: `elevator` to v2.2.1 (#1300)
upgrade: `elevator` to v2.2.1 (#1300)

This version improves the error message if the elevate.exe utility
failed.

See: https://github.com/resin-io-modules/elevator/pull/10
Signed-off-by: Juan Cruz Viotti <4148f5869aa1bcd7efd85b513a5874967e585032@openmailbox.org>
resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/etcher,resin-io/resin-etcher,resin-io/resin-etcher