deps: update num-derive requirement from 0.3 to 0.4

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-0.4.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

sprs/Cargo.toml

@@ -31,7 +31,7 @@ num_cpus = { version = "1.13.0", optional = true }
 approx = { version = "0.5", optional = true }
 
 [dev-dependencies]
-num-derive = "0.3"
+num-derive = "0.4"
 bencher = "0.1.0"
 tempfile = "3.1.0"
 bincode = "1.2.0"