chore: Move print lints to lib.rs

While there is a config for ignoring these in tests, it doesn't help
with examples.

Author: epage

Cargo.toml

@@ -73,8 +73,6 @@ needless_continue = "warn"
 needless_for_each = "warn"
 negative_feature_names = "warn"
 path_buf_push_overwrite = "warn"
-print_stderr = "warn"
-print_stdout = "warn"
 ptr_as_ptr = "warn"
 rc_mutex = "warn"
 redundant_feature_names = "warn"

src/lib.rs

@@ -1,4 +1,6 @@
 //! > DESCRIPTION
 
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![warn(clippy::print_stderr)]
+#![warn(clippy::print_stdout)]
 #![allow(non_snake_case)] // TODO: Delete me