Ignore redundant_else Clippy pedantic lint

    error: redundant else block
       --> src/mapping.rs:193:32
        |
    193 |                           } else {
        |  ________________________________^
    194 | |                             return Ordering::Less;
    195 | |                         }
        | |_________________________^
        |
        = note: `-D clippy::redundant-else` implied by `-D clippy::pedantic`
        = help: remove the `else` block and move the contents out
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_else

Author: dtolnay

src/lib.rs

@@ -77,6 +77,7 @@
     clippy::module_name_repetitions,
     clippy::needless_pass_by_value,
     clippy::option_if_let_else,
+    clippy::redundant_else,
     clippy::single_match_else,
     // code is acceptable
     clippy::cast_possible_wrap,