Update cbindgen requirement from 0.26.0 to 0.27.0

Updates the requirements on [cbindgen](https://github.com/mozilla/cbindgen) to permit the latest version.
- [Release notes](https://github.com/mozilla/cbindgen/releases)
- [Changelog](https://github.com/mozilla/cbindgen/blob/master/CHANGES)
- [Commits](mozilla/cbindgen@0.26.0...v0.27.0)

---
updated-dependencies:
- dependency-name: cbindgen
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -18,7 +18,7 @@ polyline = "0.11.0"
 libc = "0.2.154"
 
 [build-dependencies]
-cbindgen = "0.26.0"
+cbindgen = "0.27.0"
 
 [features]
 headers = []