Ignore items_after_test_module clippy false positive

rust-lang/rust-clippy#10713

    warning: items were found after the testing module
       --> src/lib.rs:148:1
        |
    148 | / mod tests;
    149 | | mod write;
    150 | |
    151 | | use std::env;
    ...   |
    600 | |     }
    601 | | }
        | |_^
        |
        = help: move the items to before the testing module was defined
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#items_after_test_module
        = note: `#[warn(clippy::items_after_test_module)]` on by default

src/lib.rs

@@ -136,6 +136,7 @@
     clippy::derive_partial_eq_without_eq,
     clippy::doc_markdown,
     clippy::items_after_statements,
+    clippy::items_after_test_module, // https://github.com/rust-lang/rust-clippy/issues/10713
     clippy::must_use_candidate,
     clippy::too_many_lines,
     clippy::type_complexity,