0.3.0

What's Changed

• Implement functions in Subject class and its child element classes by @beatrycze-volk in #8
• Implement functions in RecordInfo class and its child element classes by @beatrycze-volk in #9
• Implement functions in OriginInfo class and its child element classes by @beatrycze-volk in #10
• Implement functions in Part class and its child element classes by @beatrycze-volk in #11
• Adjust CopyInformation to match MODS documentation by @beatrycze-volk in #12
• Fix return for getValues() by @beatrycze-volk in #13
• Add IncorrectValueInAttributeException and use it for validation by @beatrycze-volk in #14
• Fix remaining PHPStan warnings by @beatrycze-volk in #15
• Fix PHP docs for ModsReader class by @beatrycze-volk in #16
• Implement PhysicalDescription element and its children by @beatrycze-volk in #17

Full Changelog: v0.2.0...v0.3.0