Use no_trailing_comma_in_singleline

- Instead of deprecated `no_trailing_comma_in_list_call` and `no_trailing_comma_in_singleline_array`
- clarify readme/composer.json the config is now for v3.11 and up
- prepare for 2.1.0 release.

Author: mfn

CHANGELOG.md

@@ -4,6 +4,10 @@ CHANGELOG
 [Next release](https://github.com/mfn/php-cs-fixer-config/compare/1.0.2...master)
 --------------
 
+2022-09-25, 2.2.0
+-----------------
+- Added `no_unneeded_import_alias`
+
 2022-09-23, 2.1.0
 -----------------
 - use `no_trailing_comma_in_singleline` instead of deprecated

src/Config.php

@@ -187,6 +187,7 @@ public static function getRules(): array
             'no_unneeded_control_parentheses' => true,
             'no_unneeded_curly_braces' => true,
             'no_unneeded_final_method' => false,
+            'no_unneeded_import_alias' => true,
             'no_unreachable_default_argument_value' => false,
             'no_unset_cast' => true,
             'no_unset_on_property' => false,