Breaking changes

• This version is built with .NET 6 SDK.
• Benchmark now uses BenchmarkDotNet.
• Changed interface names from Encoder to Coder to signify encoding and decoding functionality better.
• Simple (aka allocating) versions of Decode() will now return byte[]'s instead of Span<byte>'s for correct ownership semantics. It's even possible that some copying may be avoided in certain scenarios.
• Base16.TryDecode() doesn't throw on invalid input, but returns false instead.
• Base32.Decode() throws separate exceptions for encountered failures.

New features

• Added Bech32 flavor to Base32
• Added RFC 1924 (IPv6) flavor to Base85 along with EncodeIpv6 and DecodeIpv6 functions https://tools.ietf.org/html/rfc1924
• Added Base58.Bitcoin.EncodeCheck() and Base58.Bitcoin.TryDecodeCheck() methods.
• Added Base58.Bitcoin.EncodeCb58() and Base58.Bitcoin.TryDecodeCb58() methods.

Improvements

• Added more buffer overflow detection to Base32 coder
• Removed all unsafe code. New Span-based optimizations make the code come close to unsafe perf.
• Removed slow and hard to read optimizations like bit shift operations for multiplication and division where compiler almost always does a better job of optimizing.

Fixes

• Fixed output buffer was too small error for certain Base58 cases.
• Avoid redundant memory copy operations