0.7.0

Breaking changes

• The built-in transforms moved out of codec-core into a new
  codec-transforms module, and into packages by kind:
  org.jwcarman.codec.transform.compress (CompressionStreamCodec,
  GzipCodec, DeflateCodec) and org.jwcarman.codec.transform.encoding
  (Base64Codec). codec-core is now the SPI alone. Migration: add
  codec-transforms (the Spring Boot starter already includes it) and update
  the imports. codec-zstd now depends on codec-transforms.

Added

• codec-kafka: CodecSerializer, CodecDeserializer, and CodecSerde adapt
  any codec to Kafka's client serialization interfaces; tombstones map to
  null in both directions
• codec-spring-data-redis: CodecRedisSerializer adapts any codec to Spring
  Data Redis's RedisSerializer (and, via serializationPair(), the cache
  abstraction); Spring Boot auto-configuration serializes the cache values named
  in codec.redis.cache.caches through the application's CodecFactory
• Codec.nullSafe(): an explicit wrapper that maps null to null in both
  directions for integrations whose contract treats null as absent
• Codec.xmap(forward, backward): derive a codec for another type from an
  existing one — the domain-type-versus-wire-type tool for backends that only
  serialize generated or registered classes
• StringCodec in codec-transforms (transform.text): text as its own bytes
  in any charset, with strict decoding
• ChecksumCodec in codec-transforms (transform.checksum): a 32-bit
  checksum trailer for corruption detection, CRC-32C by default
• HexCodec in codec-transforms (RFC 4648 base16): lower- or upper-case
  output, strict case-insensitive decoding
• Base32Codec in codec-transforms (RFC 4648 §6 Base32 and §7 base32hex),
  strict case-insensitive decoding
• codec-lz4: LZ4 frame-format compression transform (Lz4Codec) with fast and
  high-compression (LZ4-HC) modes and the same decompression-bomb cap as the
  built-in transforms