Allow unnecessary_map_or

Until our MSRV reaches 1.70.0, we're gonna need
to keep allowing it.

Author: arik-so

ci/check-lint.sh

@@ -88,6 +88,7 @@ RUSTFLAGS='-D warnings' cargo clippy -- \
 	-A clippy::unnecessary_cast \
 	-A clippy::unnecessary_get_then_check \
 	-A clippy::unnecessary_lazy_evaluations \
+	-A clippy::unnecessary_map_or \
 	-A clippy::unnecessary_mut_passed \
 	-A clippy::unnecessary_sort_by \
 	-A clippy::unnecessary_to_owned \