chore(deps): update proc-macro-crate requirement from >= 2, <= 3 to >…

…= 2, <= 4 (#653)

Updates the requirements on [proc-macro-crate](https://github.com/bkchr/proc-macro-crate) to permit the latest version.
- [Release notes](https://github.com/bkchr/proc-macro-crate/releases)
- [Commits](https://github.com/bkchr/proc-macro-crate/commits)

---
updated-dependencies:
- dependency-name: proc-macro-crate
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -89,7 +89,7 @@ parking_lot = "0.12"
 path-slash = "0.2"
 percent-encoding = "2"
 pin-project = "1"
-proc-macro-crate = {version = ">= 2, <= 3"}
+proc-macro-crate = {version = ">= 2, <= 4"}
 proc-macro-error = "1"
 proc-macro2 = "1"
 quinn = { version = "0.10", default-features = false }