build: Bump semver from 1.0.18 to 1.0.19 in /fuzz

Bumps [semver](https://github.com/dtolnay/semver) from 1.0.18 to 1.0.19.
- [Release notes](https://github.com/dtolnay/semver/releases)
- [Commits](https://github.com/dtolnay/semver/compare/1.0.18...1.0.19)

---
updated-dependencies:
- dependency-name: semver
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

fuzz/Cargo.lock

@@ -649,9 +649,9 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0293b4b29daaf487284529cc2f5675b8e57c61f70167ba415a463651fd6a918"
+checksum = "ad977052201c6de01a8ef2aa3378c4bd23217a056337d1d6da40468d267a4fb0"
 
 [[package]]
 name = "serde"