Cargo Features

tfhe-c-api-dynamic-buffer has no features set by default.

[dependencies]
tfhe-c-api-dynamic-buffer = { version = "0.1.0", features = ["c_api_print_error_source", "c_api"] }
c_api_print_error_source
c_api build

This may seem counter-intuitive but we output the .h file at the same location as the lib files which cargo publish complains with, so we make the C API part optional

Enables cbindgen ^0.26.0