RUSTSEC-2021-0146: Crate twoway deprecated by the author

[github-actions]

Crate twoway deprecated by the author

Details
Status	unmaintained
Package	twoway
Version	0.1.8
URL	https://github.com/bluss/twoway
Date	2021-05-20

The commit e99b3c7 releasing version 0.2.2 explicitely deprecates twoway in favour of memchr crate.

See advisory page for additional details.

[kate-goldenring]

twoway is a dep of mulitpart, which we bring in via warp. We currently are using warp to serve prometheus metrics in our shared crate. We will need to wait for multipart to migrate to memchr and warp to bump its version of multipart. Then, we can bump to that version of warp.

[github-actions]

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