Bump rack version

[RailsCod3rFuture]

Hey, can you guys bump the rack version to its latest release. We're picking up a vulnerability on AWS Inspection Scanner.

[RailsCod3rFuture]

bump @ncr

[ncr]

Currently on vacation. Please ping me after 20th, I'll do it.

[gentlemich]

@ncr any updates? Thanks

[ncr]

Updated the code in the repo but can't publish the gem atm. Changed phone and lost the OTP recovery keys and waiting for rubygems support to somehow let me in :) Will publish as soon as it happens.

[gentlemich]

@ncr thanks! I'll use the repo for now