allow internal features

Cargo.toml

@@ -46,15 +46,13 @@ std_instead_of_core = "warn"
 std_instead_of_alloc = "warn"
 alloc_instead_of_core = "warn"
 
-[lints.rust]
-unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docsrs_dep)'] }
-
 [workspace.lints.rust]
 missing_docs = "warn"
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docsrs_dep)'] }
 unsafe_code = "deny"
 unsafe_op_in_unsafe_fn = "warn"
 unused_qualifications = "warn"
+internal_features = { level = "allow" }
 
 [package.metadata.docs.rs]
 # This cfg is needed so that #[doc(fake_variadic)] is correctly propagated for