Bump rustc_version from 0.3.3 to 0.4.0 (use-ink#291)

Bumps [rustc_version](https://github.com/Kimundi/rustc-version-rs) from 0.3.3 to 0.4.0.
- [Release notes](https://github.com/Kimundi/rustc-version-rs/releases)
- [Commits](djc/rustc-version-rs@v0.3.3...v0.4.0)

---
updated-dependencies:
- dependency-name: rustc_version
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

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

Cargo.toml

@@ -32,7 +32,7 @@ codec = { package = "parity-scale-codec", version = "2.1", features = ["derive"]
 which = "4.1.0"
 colored = "2.0.0"
 toml = "0.5.8"
-rustc_version = "0.3.3"
+rustc_version = "0.4.0"
 blake2 = "0.9.1"
 contract-metadata = { version = "0.2.0", path = "./metadata" }
 semver = { version = "1.0.3", features = ["serde"] }