Log Message:
cbindgen: Update to 0.16.0

* Fix HOMEPAGE.

Changelog:
     * Remove artificial restriction on lifetime parameters on enums (#604)
     * Add an option for converting usize/isize into size_t/ptrdiff_t. (#606)
     * Allow controlling the cargo profile used for expansion. (#607)
     * Support wider range of expressions in enum discriminants (#614)
     * Support generation of Cython bindings (#590)
     * Fixed some issues with style=tag and recursive structs (#615)
     * Default C style to Both (as specified in docs) (#615)
     * Fix resolution of path dependencies from certain modules. (#629)
     * Support inlined definitions for tuple variants with a single field in C (#631)