Dynamic Properties Created

[mbabker]

Q	A
Bug report?	no
Feature request?	no
BC Break report?	no
RFC?	no

Running the test suite locally on PHP 8.2 (which isn't covered in CI right now) with #113 gives this output:

$ vendor/bin/phpunit 
PHPUnit 9.6.10 by Sebastian Bergmann and contributors.

Warning:       Your XML configuration validates against a deprecated schema.
Suggestion:    Migrate your XML configuration using "--migrate-configuration"!

SS................................................WPHP Deprecated:  Creation of dynamic property Metadata\MethodMetadata::$unknownProperty is deprecated in /Users/mbabker/Sites/metadata/src/MethodMetadata.php on line 68
.
Deprecated: Creation of dynamic property Metadata\MethodMetadata::$unknownProperty is deprecated in /Users/mbabker/Sites/metadata/src/MethodMetadata.php on line 68
..

Time: 00:04.136, Memory: 8.00 MB

There was 1 warning:

1) Metadata\Tests\MethodMetadataTest::testReadAccessForUnknownProperty
Expecting E_WARNING and E_USER_WARNING is deprecated and will no longer be possible in PHPUnit 10.

WARNINGS!
Tests: 55, Assertions: 117, Warnings: 1, Skipped: 2.

The PHPUnit deprecation can be dealt with at a later point as it only affects the testing environment, but the dynamic property creation in the Metadata\MethodMetadata class introduced via #78 should be reviewed at some point.