chore: change default lint level to warning and deny warnings in CI (#1416)

tokio-process/src/lib.rs

@@ -118,8 +118,7 @@
 //! be regained with the `Child::forget` method.
 
 #![doc(html_root_url = "https://docs.rs/tokio-process/0.3.0")]
-#![deny(missing_debug_implementations, missing_docs, rust_2018_idioms)]
-#![cfg_attr(test, deny(warnings))]
+#![warn(missing_debug_implementations, missing_docs, rust_2018_idioms)]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 

tokio-process/tests/issue_42.rs

@@ -1,5 +1,5 @@
 #![cfg(unix)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use futures_util::future::FutureExt;
 use futures_util::stream::FuturesOrdered;

tokio-process/tests/smoke.rs

@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![feature(async_await)]
 
 use tokio_process::CommandExt;

tokio-process/tests/stdio.rs

@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![feature(async_await)]
 
 #[macro_use]

tokio-process/tests/support/mod.rs

@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use futures_util::future;
 use futures_util::future::FutureExt;