Add support for enum default arguments using enum cases (#1464)

* add case when default value is of type enum

* Update CHANGELOG.md

* add tests for enum arguments default values

* ignore psalm issue (built-in `\UnitEnum` class does not exists in PHP7)

* Update run-static-analysis.yml to use PHP8.1

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Co-authored-by: Barry vd. Heuvel <[email protected]>
Co-authored-by: Barry vd. Heuvel <[email protected]>

src/Console/ModelsCommand.php

@@ -1099,6 +1099,8 @@ class ModelsCommand extends Command
                     $default = 'null';
                 } elseif (is_int($default)) {
                     //$default = $default;
+                } elseif ($default instanceof \UnitEnum) {
+                    $default = '\\' . get_class($default) . '::' . $default->name;
                 } else {
                     $default = "'" . trim($default) . "'";
                 }