merde-v6.0.0

Added

• [breaking] Include key name in error (#73)

Other

• Initial merde_yaml addition (#77)
• Remove ValueDeserialize macros
• Make option optional
• Port more things to deserialize
• Steal @compiler-errors's suggestion (thanks Michael!)
• port one more example
• impl_deserialize is a noop unless the feature is enabled
• Convert example
• Move mixed example to deserialize
• Move more examples over to Deserialize
• Move away from ValueDeserialize
• Fix all tests
• add lifetimes to errors aw yiss