Key partition feature improvements across versions

•  Prior to v10: 
• Partitioning via table inheritance, CHECK constraints and triggers
• V10: 
• Native partition tables, through declarative partitioning
• V11: 
• Support HASH partitioning method
• Support PK/UK/FK for partitioned tables
• Automatic creation indexes for each partitions
• Support DEFAULT partition for values not included in partitions
• Support Partition-wise join and aggregation
• V12: 
• New functions to view partition structure: pg_partition_tree, pg_partition_root, pg_partition_ancestors
• V13:
• Support logical replication
• Support ROW level BEFORE INSERT trigger
• V14: 
• Support REINDEX on partitioned table 
• Support pg_dump restore single partition as a table
• Support different collation for different partitions