v0.3.0

Updated

• Heapless has been updated to v0.8

Added

• JsonNumber and Value now have these additional helpers for converting to
  native numeric types:

  • as_u8
  • as_u16
  • as_u32
  • as_u64
  • as_u128
  • as_usize
  • as_i8
  • as_i16
  • as_i32
  • as_i64
  • as_i128
  • as_isize
  • as_f32
  • as_f64

• JsonNumber::parse() is a new function that uses a types FromStr
  implementation to parse the source of the numeric literal.