fix(c-api) Move the middleware API into the unstable module.

lib/c-api/src/lib.rs

@@ -41,7 +41,5 @@
 #[cfg(feature = "deprecated")]
 pub mod deprecated;
 pub mod error;
-#[cfg(feature = "middlewares")]
-pub mod metering;
 mod ordered_resolver;
 pub mod wasm_c_api;

lib/c-api/src/wasm_c_api/unstable/middlewares/metering.rs

@@ -1,6 +1,6 @@
 // C API for metering.
 
-use super::wasm_c_api::instance::wasm_instance_t;
+use super::super::super::instance::wasm_instance_t;
 use std::sync::Arc;
 use wasmer::wasmparser::Operator;
 use wasmer_middlewares::{

lib/c-api/src/wasm_c_api/unstable/middlewares/mod.rs

@@ -0,0 +1 @@
+pub mod metering;

lib/c-api/src/wasm_c_api/unstable/mod.rs

@@ -1,3 +1,5 @@
 pub mod engine;
+#[cfg(feature = "middlewares")]
+pub mod middlewares;
 pub mod module;
 pub mod target_lexicon;