v2.0.0

Breaking Changes

• The format module has been refactored to pass Write by value rather than
  by mutable reference. Most code should not be affected because Write is
  implemented for &mut Write.

Changed

• The unit type () and Option::None are more fuzzy when deserializing. If
  users deserialize a value that was serialized as None or (), the default
  value will be returned rather than an error, when possible. For example:

  let unit = pot::to_vec(&())?;
  assert_eq!(pot::from_slice(&unit).unwrap(), 0_u32)
  let none = pot::to_vec(&Option::<bool>::None)?;
  assert_eq!(pot::from_slice(&unit).unwrap(), 0_u32)

  This is not practically useful for most users, but when designing traits that
  have associated serializable types, sometimes it's useful to use () when no
  data needs to be stored. However, it can be painful to update existing data
  when switching between () and other types, as Serde offers no built-in
  transmutation. Pot now offers this internally.

Added

• Value::from_serialize and Value::deserialize_as have been added, allowing
  Value to be transmuted directly from types that implement Serialize and
  Deserialize.
• OwnedValue is a new-type wrapper around Value<'static> that can be used in
  situations where DeserializeOwned is a requirement. This type is needed
  because Value<'a> can borrow from the source of the deserialization, and
  this flexibility causes lifetime errors when trying to deserialize a
  Value<'static> as DeserializeOwned.