v0.3.0

• Added authentication header providers
• Added PHP8 support
• Deprecated findOneByIri, findOneBy, findBy, findAll methods in AbstractMicroserviceHttpRepository
• Added fetchOneByIri, fetchOneBy, fetchBy, fetchAll methods in AbstractMicroserviceHttpRepository
• Deprecated PaginatedCollectionIterator::iterateOver
• Added PaginatedCollectionIterator::iterateItems
• Added PaginatedCollectionIterator::iteratePages