YOJ 2.1.0 (Default Mapping Improvements)

• Add explicit annotation for experimental and/or unstable APIs (@ExperimentalApi)
  Experimental APIs can go away or change incompatibly in any release.
• Java<->YDB mapping improvements in yoj-repository-ydb-v2 (not backported to yoj-repository-ydb-v1)
  • #20: Allow better mapping defaults for String and Instant Java types
    Use YqlPrimitiveType.useRecommendedMappingFor(STRING, ENUM, TIMESTAMP) in all new projects.
    This new "recommended mapping" will eventually become the default.
  • #20: Map Duration -> INTERVAL YDB column by default, no @Column annotation required
• Minor API improvements in yoj-repository-ydb-v2:
  • BREAKING(severity=low): Remove unused YqlUtils class
  • Deprecate YqlType.of() and YqlPrimitiveType.of() for removal from yoj-repository-ydb-v2