embedded-io

io: remove supertraits for ReadReady, WriteReady. Release 0.7.1

• Do not require Read and Write to be implemented for ReadReady and WriteReady.

• Add trait dependency on core::error::Error to this crate's Error trait
  • Implement the trait on all provided implementations
  • Migrate std feature-gated std::error::Error implementations to core::error::Error
• Updat defmt dependency to 1.0; rename feature from defmt_03 to defmt
• Increase MSRV to 1.81 due to core::error::Error
• Implement ReadReady for &[u8] and WriteReady for &mut [u8]
• Require Read and Write to be implemented for various Read and Write traits
• Add provided .seek_relative() method to Seek
• Fix missing method forwardings for blanket implementations
• Specialize .read_exact() and .write_all() for slices
• Implement Read, ReadReady, BufRead, Write, and WriteReady for VecDeque<u8>

• Make SliceWriteError publicly available.

• Prohibit Write::write implementations returning Ok(0) unless there is no data to write; consequently remove WriteAllError and the WriteAllError variant of WriteFmtError. Update the &mut [u8] impl to possibly return a new SliceWriteError if the slice is full instead of Ok(0).
• Add WriteZero variant to ErrorKind for implementations that previously may have returned Ok(0) to indicate no further data could be written.
• Write::write_all now panics if the write() implementation returns Ok(0).

• Add ReadReady, WriteReady traits. They allow peeking whether the I/O handle is ready to read/write, so they allow using the traits in a non-blocking way.
• Add variants to ErrorKind mirroring std::io::ErrorKind.
• Add From impls to convert between ErrorKind and std::io::ErrorKind.
• Moved embedded_io::blocking to the crate root.
• Split async traits to the embedded-io-async crate.
• Split trait adapters to the embedded-io-adapters crate.
• Add std::error impls for ReadExactError & WriteAllError.
• Rename trait Io to ErrorType, for consistency with embedded-hal.
• Added optional defmt 0.3 support.

• Switch all traits to use async_fn_in_trait (AFIT). Requires nightly-2022-11-22 or newer.

• Fix compilation on recent nightlies (#5)

• FromFutures adapter now requires futures Cargo feature. (breaking change)
• Add FromTokio adapter.
• Add blanket impls for &mut T, Box<T>.
• Add impl Read, BufRead for &[u8]
• Add impl Write for &mut [u8]
• Add impl Write for Vec<u8>
• impl std::error::Error for ReadExactError, WriteFmtError.

• First release