UPGRADE-6.1.md

UPGRADE FROM 6.0 to 6.1

Serializer

• Deprecate ContextAwareNormalizerInterface, use NormalizerInterface instead
• Deprecate ContextAwareDenormalizerInterface, use DenormalizerInterface instead
• Deprecate ContextAwareEncoderInterface, use EncoderInterface instead
• Deprecate ContextAwareDecoderInterface, use DecoderInterface instead