Ignore map_err_ignore Clippy pedantic lint

Author: dtolnay

serde/src/lib.rs

@@ -118,6 +118,7 @@
         zero_prefixed_literal,
         // correctly used
         enum_glob_use,
+        map_err_ignore,
         wildcard_imports,
         // not practical
         needless_pass_by_value,

serde_derive/src/lib.rs

@@ -38,6 +38,7 @@
     clippy::filter_map,
     clippy::indexing_slicing,
     clippy::items_after_statements,
+    clippy::map_err_ignore,
     clippy::match_same_arms,
     clippy::module_name_repetitions,
     clippy::must_use_candidate,