Added version 3.0.0:

- Template name changed from PostgresPro-[PLATFORM] to Mamonsu PostgreSQL [PLATFORM];
- Changed PostgreSQL uptime metric type to unixtime (date and time of service start);
- Changed Cache Hit Ratio metric calculation: now it evaluates via Zabbix calculated item;
- Changed Archive Command plugin metrics: now they evaluate without accessing the FS;
- Metric name pgsql.transactions [total] changed to pgsql.transactions [committed];
- Added new PG14 metrics based on pg_stat_wal and pg_stat_statements_info;
- Removed graphs representing only one metric (since this duplicates the functionality of Zabbix simple graphs);
- Added new graphs: PostgreSQL bgwriter buffers, PostgreSQL bgwriter write/sync, PostgreSQL checkpoint count, PostgreSQL checkpoint write/sync;
- Added screens: Overview, PostgreSQL Instance, PostgreSQL WAL, PostgreSQL Locks, PostgreSQL Transactions, System;
- Fixed support for different Zabbix versions (3.0-5.4):
- Added new bootstrap flag x/--create-extensions to optionally create extensions;
- Added default mamonsu user creation to bootstrap tool;
- Added mamonsu own schema creation to bootrtap tool;
- Changed mamonsu plugin structure: added new parameter for Zabbix screens;
- Fixed #159;

Author: cuprumtan