Release an intermediary version with the warning to migrate.

Fixed

• Relationship#record_type_for does not assign static record type for polymorphic relationships (#83)

Fixed

• ObjectSerializer#serialized_json accepts arguments for to_json (#80)

Added

• Serializer option support for procs (#32)
• JSON serialization API method is now implementable (#44)

Changed

• Support for polymorphic id_method_name (#17)
• Relationships support for &:proc syntax (#58)
• Conditional support for procs (#59)
• Attribute support for procs (#67)
• Refactor caching support (#52)
• is_collection? is safer for objects (#18)

Removed

• serialized_json is now deprecated (#44)

Added

• Allow relationship links to be delcared as a method (#2)
• Test against Ruby 2.6 (#1)
• Include data key when lazy-loaded relationships are included (#10)
• Conditional links #15
• Include params on set_id block #16

Changed

• Optimize SerializationCore.get_included_records calculates remaining_items only once (#4)
• Optimize SerializtionCore.parse_include_item by mapping in place (#5)
• Define ObjectSerializer.set_key_transform mapping as a constant (#7)
• Optimize SerializtionCore.remaining_items by taking from original array (#9)
• Optimize ObjectSerializer.deep_symbolize by using each_with_object instead of Hash[map] (#6)