PR #820 changed the config struct in a way that breaks existing code:

@@ -1003,6 +1003,8 @@ pub struct Config {
     pub only_target_dependencies: bool,
     /// Configuration options specific to Cython.
     pub cython: CythonConfig,
+    #[serde(skip)]
+    pub(crate) config_path: Option<StdPathBuf>,
 }

 impl Default for Config {

Our code initialises Config not via ::default() but like this:

cbindgen::Config {
        pragma_once: true,
        include_version: true,
        // some more fields here
        ..Default::default()
    }

and that causes

error[E0451]: field `config_path` of struct `Config` is private
  --> api/cpp/cbindgen.rs:83:11
   |
83 |         ..Default::default()
   |           ^^^^^^^^^^^^^^^^^^ field `config_path` is private

I can work around this of course by using Config::default(), but unfortunately the crate release with this change breaks our existing crate on crates.io that relies on this :-(