build(deps): update num-derive requirement from 0.3 to 0.4 (#26)

Updates the requirements on [num-derive](https://github.com/rust-num/num-derive) to permit the latest version.
- [Changelog](https://github.com/rust-num/num-derive/blob/master/RELEASES.md)
- [Commits](rust-num/num-derive@num-derive-0.3.0...num-derive-0.4.0)

---
updated-dependencies:
- dependency-name: num-derive
  dependency-type: direct:production
...

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

proto/Cargo.toml

@@ -25,7 +25,7 @@ subtle-encoding = { version = "0.5", default-features = false, features = [
     "alloc",
 ] }
 num-traits = { version = "0.2", default-features = false }
-num-derive = { version = "0.3", default-features = false }
+num-derive = { version = "0.4", default-features = false }
 time = { version = "0.3", default-features = false, features = [
     "macros",
     "parsing",