build: bump semver from 1.0.5 to 1.0.6 in /fuzz

Bumps [semver](https://github.com/dtolnay/semver) from 1.0.5 to 1.0.6.
- [Release notes](https://github.com/dtolnay/semver/releases)
- [Commits](https://github.com/dtolnay/semver/compare/1.0.5...1.0.6)

---
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

@@ -546,9 +546,9 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0486718e92ec9a68fbed73bb5ef687d71103b142595b406835649bebd33f72c7"
+checksum = "a4a3381e03edd24287172047536f20cabde766e2cd3e65e6b00fb3af51c4f38d"
 
 [[package]]
 name = "serde"