Update tonic to tower 0.5

[kanpov]

Feature Request

Crates

tonic

Motivation

Currently, an empty tokio + tonic project pulls in both tower 0.5 and tower 0.4, which is undesirable.

Proposal

Bump to tower 0.5

Alternatives

[kanpov]

Fixed in #2004 once it gets merged.

[hatomist]

+1 on this, bumping tower fixes builds on riscv-musl architecture (or anything that is built with -Zbuild-std) as per this ticket tower-rs/tower#771

[kanpov]

+1 on this, bumping tower fixes builds on riscv-musl architecture (or anything that is built with -Zbuild-std) as per this ticket tower-rs/tower#771

Well as far as understand it, #1892 fixing the issue has been open for a while but doesn't seem to be getting merged any time soon.