Merge pull request #24 from jwodder/lint-1.80

Update lints for Rust 1.80

Cargo.toml

@@ -81,6 +81,7 @@ irrefutable_let_patterns = "deny"
 mixed_script_confusables = "deny"
 named_arguments_used_positionally = "deny"
 no_mangle_generic_items = "deny"
+non_contiguous_range_endpoints = "deny"
 non_fmt_panics = "deny"
 non_shorthand_field_patterns = "deny"
 noop_method_call = "deny"
@@ -97,8 +98,8 @@ trivial_bounds = "deny"
 type_alias_bounds = "deny"
 unconditional_recursion = "deny"
 undefined_naked_function_abi = "deny"
+unexpected_cfgs = "deny"
 ungated_async_fn_track_caller = "deny"
-unknown_lints = "deny"
 unused_associated_type_bounds = "deny"
 unused_comparisons = "deny"
 useless_ptr_null_checks = "deny"
@@ -213,6 +214,7 @@ rest_pat_in_fully_bound_structs = "deny"
 same_functions_in_if_condition = "deny"
 semicolon_if_nothing_returned = "deny"
 should_panic_without_expect = "deny"
+single_char_pattern = "deny"
 single_match_else = "deny"
 stable_sort_primitive = "deny"
 string_add_assign = "deny"