* Fix path to psalm
* If a magic getter or setter is used to access a property on a class
that is not defined but a `@property` annotation for the property
exists, throw an error. If no `@property` annotation exists, it's not
an error because you're allowed to make magic getters and setters do
crazy things.
Fixes#480
* Move logic to a better place to avoid duplicate checks
* Move logic into function
* Remove some nesting
* Check psalm-seal-properties and property type correctly
