feat(c-api) Use our fork of cbindgen.

Our fork contains incoming PR. It helps for example to skip struct
fields.

lib/c-api/src/wasm_c_api/externals/table.rs

@@ -5,6 +5,7 @@ use wasmer::{Store, Table};
 
 #[repr(C)]
 pub struct wasm_table_t {
+    /// cbindgen:ignore
     // maybe needs to hold onto instance
     pub(crate) inner: Table,
 }