feat(expr): PostgreSQL 18 new expressions

[xiangjinwu]

https://www.postgresql.org/docs/18/release-18.html#RELEASE-18-DATATYPES

• jsonb
  • jsonb null cast to sql null
  • json_strip_nulls for null array elements
• array
  • array_sort ( array anyarray [, descending boolean [, nulls_first boolean ]] ) → anyarray
  • array_reverse ( anyarray ) → anyarray
• bytea
  • reverse ( bytea ) → bytea
  • explicit cast int2/4/8 <-> bytea
  • crc32 ( bytea ) → bigint
  • crc32c ( bytea ) → bigint
• unicode text
  • casefold ( text ) → text
• math
  • gamma ( double precision ) → double precision
  • lgamma ( double precision ) → double precision