Update num-derive requirement from 0.2 to 0.3

Updates the requirements on [num-derive](https://github.com/rust-num/num-derive) to permit the latest version.
- [Release notes](https://github.com/rust-num/num-derive/releases)
- [Changelog](https://github.com/rust-num/num-derive/blob/master/RELEASES.md)
- [Commits](rust-num/num-derive@num-derive-0.2.0...num-derive-0.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.toml

@@ -12,7 +12,7 @@ failure = "0.1.5"
 serde="1"
 serde_derive = "1"
 num-traits = "0.2"
-num-derive = "0.2"
+num-derive = "0.3"
 lazy_static = "1"
 bitflags = "1"