build: bump semver from 1.0.11 to 1.0.12 in /fuzz

Bumps [semver](https://github.com/dtolnay/semver) from 1.0.11 to 1.0.12.
- [Release notes](https://github.com/dtolnay/semver/releases)
- [Commits](https://github.com/dtolnay/semver/compare/1.0.11...1.0.12)

---
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

@@ -543,9 +543,9 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.11"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d92beeab217753479be2f74e54187a6aed4c125ff0703a866c3147a02f0c6dd"
+checksum = "a2333e6df6d6598f2b1974829f853c2b4c5f4a6e503c10af918081aa6f8564e1"
 
 [[package]]
 name = "serde"