Fix `bindgen-tests`

Cargo.lock

diff --git a/Cargo.lock b/Cargo.lock
index 2e83e9e..2d86c44 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -72,10 +72,12 @@
  "clap_complete",
  "owo-colors",
  "prettyplease",
+ "serde",
  "shlex",
  "similar",
  "syn 2.0.76",
  "tempfile",
+ "toml",
 ]
 
 [[package]]

bindgen-tests/Cargo.toml

diff --git a/bindgen-tests/Cargo.toml b/bindgen-tests/Cargo.toml
index a253b34..a2062a9 100644
--- a/bindgen-tests/Cargo.toml
+++ b/bindgen-tests/Cargo.toml
@@ -23,3 +23,7 @@
 __testing_only_extra_assertions = ["bindgen/__testing_only_extra_assertions"]
 __testing_only_libclang_9 = ["bindgen/__testing_only_libclang_9"]
 __testing_only_libclang_16 = ["bindgen/__testing_only_libclang_16"]
+
+[dependencies]
+serde = { version = "1.0.209", features = ["derive"] }
+toml = "0.8.19"