Log Message:
cbindgen: update to 0.8.4.

0.8.4

* Support for package renaming in Cargo.toml
* Improved error messages for |cargo metadata| failures
* Replaced 'test.py' harness with |cargo test|
* Char constants will now be escaped properly
* Visibility of constants will now be respected
* Added a C99 doc comment style

0.8.3

Changes not found.