Add PHP 8.1 to shims and build (#1365)

* Add PHP 8.1 to shims and build

* Lock psr/container version

* Lock psr version

* Restrict symfony component versions

* Downgrade event-dispatcher-contracts

* Update more package versions

* php-cs fixes

* style fix

* cs-fixer file fix

* Exclude resources dir from cs fixer

* Ignore cs fixer env check

* Update league/csv

tests/VersionTest.php

@@ -38,7 +38,7 @@ class VersionTest extends TestCase
 
             $this->assertTrue(
                 $versionSvc->isGreaterThan($newVersion, $currentVersion),
-                "{$newVersion} not greater than ${currentVersion}"
+                "$newVersion not greater than $currentVersion"
             );
         }
     }