PostgresMajorVersion type
Defines values for PostgresMajorVersion.
KnownPostgresMajorVersion can be used interchangeably with PostgresMajorVersion,
this enum contains the known values that the service supports.
Known values supported by the service
18: PostgreSQL 18.
17: PostgreSQL 17.
16: PostgreSQL 16.
15: PostgreSQL 15.
14: PostgreSQL 14.
13: PostgreSQL 13.
12: PostgreSQL 12.
11: PostgreSQL 11.
type PostgresMajorVersion = string