Exclude benchmark dependencies from being compiled by miri

Author: dtolnay

Cargo.toml

@@ -15,7 +15,7 @@ rust-version = "1.68"
 [dependencies]
 no-panic = { version = "0.1", optional = true }
 
-[dev-dependencies]
+[target.'cfg(not(miri))'.dev-dependencies]
 criterion = { version = "0.8", default-features = false }
 
 [[bench]]