chore: update futures & futures-core to 0.3.30 across workspace

[zopieux]

PR Type

Other

PR Checklist

• [x] Tests for the changes have been added / updated. (not applicable)
• [x] Documentation comments have been added / updated. (not applicable)
• [x] A changelog entry has been made for the appropriate packages. (not applicable)
• [x] Format code with the nightly rustfmt (cargo +nightly fmt). (not applicable)

Overview

The ancient futures & futures-core versions currently pinned are causing obscure issues with e.g. Identity (in actix-identity) not being recognized anymore by just adding the futures crate (any version) in a project that also depends on actix-identity. Bumping futures version in actix-* fixes it.

[robjtede]

Thank you for the report and contribution.

Increasing these version requirements is rarely the true solution to problems such as what you're describing. I've aligned the requirements to ^0.3.17 but without a reproduction case I don't want to accept this PR.