build(deps): bump cbindgen from 0.15.0 to 0.16.0 in /tooling

Bumps [cbindgen](https://github.com/eqrion/cbindgen) from 0.15.0 to 0.16.0.
- [Release notes](https://github.com/eqrion/cbindgen/releases)
- [Changelog](https://github.com/eqrion/cbindgen/blob/master/CHANGES)
- [Commits](https://github.com/eqrion/cbindgen/compare/v0.15.0...v0.16.0)

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

tooling/Cargo.lock

@@ -34,9 +34,9 @@ checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
 name = "cbindgen"
-version = "0.15.0"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1df6a11bba1d7cab86c166cecf4cf8acd7d02b7b65924d81b33d27197f22ee35"
+checksum = "9344318b9c787667b95cd2c5124f5eaf2bde35e959dd01ea04fc5b234c542c11"
 dependencies = [
  "clap",
  "heck",

tooling/bindgen/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = ["Colin Walters <walters@verbum.org>"]
 
 [dependencies]
-cbindgen = "0.15.0"
+cbindgen = "0.16.0"
 
 # Might as well keep these from the main Rust source
 [profile.release]