v0.2.0

What's Changed

• Update PHPdocs for classes by @beatrycze-volk in #1
• Add tests for ModsReader by @beatrycze-volk in #2
• Implement Language element by @beatrycze-volk in #3
• Implement functions in Location class and its child element classes by @beatrycze-volk in #4
• Implement functions in TitleInfo class by @beatrycze-volk in #5
• Implement functions in Name class and its child element classes by @beatrycze-volk in #6
• Update README file by @beatrycze-volk in #7

Full Changelog: v0.1.0...v0.2.0