Log Message:
cbindgen: Update to 0.12.1

Changelog:
0.12.1
 * Added support for #[repr*64)] on enums. \ 
https://github.com/eqrion/cbindgen/pull/441
 * Added support to generate plain enums instead of enum classes for C++. \ 
https://github.com/eqrion/cbindgen/pull/443
 * Fixed dependency resolution with lockfile v2. \ 
https://github.com/eqrion/cbindgen/pull/438

0.12.0
 * Added support for #[repr(align)] and #[repr(packed)] on structs and unions. \ 
https://github.com/eqrion/cbindgen/pull/431
 * Added support to generate copy-assignment operators for enums. \ 
https://github.com/eqrion/cbindgen/pull/434

0.11.1
Not available

0.11.0
 * Made rust char map to uint32_t. https://github.com/eqrion/cbindgen/pull/424