Amazon Aurora supports PostgreSQL 12

Amazon Aurora with PostgreSQL compatibility now supports major version 12. PostgreSQL 12 includes better index management, improved partitioning capabilities, and the ability to execute JSON path queries per SQL/JSON specifications. It also enables nondeterministic collations that support case-insensitive and accent-insensitive comparisons for ICU provided collations, most common-value statistics for improved query plans, creation of generated columns that compute values with an expression, and many additional features.

Source:: Amazon AWS