upgrade cookie to 0.18

[kazuk]

PR Type

• Other

PR_TYPE

PR Checklist

• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• A changelog entry has been made for the appropriate packages.
• Format code with the latest stable rustfmt.
• (Team) Label with affected crates and semver status.

Overview

We use actix-web. and finds old base64 dependency. come from cookie, from actix-web.
This PR upgrade cookie, and fix cookie's breaking change.

Format code with the latest stable rustfmt.

I run and gets many warnings. no-diff s made.

~/actix-web$ cargo fmt
Warning: can't set `imports_granularity = Crate`, unstable features are only available in nightly channel.
Warning: can't set `group_imports = StdExternalCrate`, unstable features are only available in nightly channel.
Warning: can't set `imports_granularity = Crate`, unstable features are only available in nightly channel.

[kazuk]

Sorry! duplicated with #3336

We waiting v5 to ship. thank you.