serde_with v1.9.0

Added

• Added FromInto and TryFromInto adapters, which enable serialization by converting into a proxy type.

  // Rust
  #[serde_as(as = "FromInto<(u8, u8, u8)>")]
  value: Rgb,
  
  impl From<(u8, u8, u8)> for Rgb { ... }
  impl From<Rgb> for (u8, u8, u8) { ... }
  
  // JSON
  "value": [128, 64, 32],

• New serde_conv! macro to create conversion types with reduced boilerplate.
  The generated types can be used with #[serde_as] or serde's with-attribute.

  serde_with::serde_conv!(
      RgbAsArray,
      Rgb,
      |rgb: &Rgb| [rgb.red, rgb.green, rgb.blue],
      |value: [u8; 3]| -> Result<_, std::convert::Infallible> {
          Ok(Rgb {
              red: value[0],
              green: value[1],
              blue: value[2],
          })
      }
  );