Bump pgxn to version 12.1.6 (#1112)

* Bump pgxn to version 12.1.6

* Update PostgreSQL requirement to version 14.0.0

Author: gurkanindibay

Diff for: META.json

@@ -2,15 +2,15 @@
    "name": "citus",
    "abstract": "Scalable PostgreSQL for real-time workloads",
    "description": "Citus horizontally scales PostgreSQL across commodity servers using sharding and replication. Its query engine parallelizes incoming SQL queries across these servers to enable real-time responses on large datasets.",
-   "version": "12.1.5",
+   "version": "12.1.6",
    "maintainer": "\"Citus Data\" <[email protected]>",
    "license": "agpl_3",
    "provides": {
       "citus": {
          "abstract": "Citus Distributed Database",
          "file": "citus.so",
          "docfile": "README.md",
-         "version": "12.1.5"
+         "version": "12.1.6"
       }
    },
    "prereqs": {

Diff for: pkgvars

@@ -1,3 +1,3 @@
 pkgname=citus
 pkgdesc='Citus (Open-Source)'
-pkglatest=12.1.5
+pkglatest=12.1.6