[ { "type": "enhancement", "category": "Aws\\Signature", "description": "Added the ability for signatures to be generated off of \\DateTimeInterface objects that are not based on \\DateTime." }, { "type": "api-change", "category": "MediaConvert", "description": "This release adds language code support according to the ISO-639-3 standard. Custom 3-character language codes are now supported on input and output for both audio and captions." } ]