UniqueExtractor: extracting from resource logic fixed

Thanks @markrogoyski for the elegant solution.

UniqueExtractor: extracting from array logic fixed

v2.1.2

`UniqueExtractor`: extracting from array logic fixed.

ObjectAccess and MapAccess are refactored

1. ObjectAccess, MapAccess: getter and setter prefers getter and setters then direct property access.
2. ObjectAccess, MapAccess: throws Smoren\TypeTools\Exceptions\KeyError if the given key is not accessable.
3. Tests updated.
4. README updated.

MapAccess, ObjectAccess: setters added

MapAccess, ObjectAccess: setters added

ObjectTypeCaster added

v1.1.0

Class `ObjectTypeCaster` added.

First stable release

v1.0.0

README updated.

Initial release

v0.0.1

initial