prepare v2.2.1

* Fixed PHP-8.2 compatibility (see gh issue #46)

v2.2.0: release 2.2.0

* Fixed PHP-8.1 compatibility (see gh issues #40 and #41)
* Fixed asynchronous actions not cleared prior some synchronous actions
* Added connection constants of PostgreSQL-10+ to pq\Connection:
  CHECK_WRITABLE, CONSUME, and GSS_STARTUP
* Added BYTEA unescaping support (see gh issue #38)

v2.1.8: release 2.1.8

Fix PHP-8 compatibility

v2.1.7: release 2.1.7

* Fix PHP-7.4 compatibility (undefined ulong on some platforms)

v2.1.6: release 2.1.6

  * Fix PgSQL-12 compatibility
  * Fix PHP-7.4 compatibility
  * Fix empty arrays parsing (Dmitry Simushev)

v2.1.5: prepare release 2.1.5

* Fix PHP-7.3 compatibility

v2.1.4: prepare release 2.1.4

* Fix #30: pq\Types is restricted to non-composite types

v2.1.3: release 2.1.3

* Fix gh-issue #27: crash in pq\Connection::escapeBytea()
+ Update static pq\Types with PostgreSQL-10 types

v2.1.2: release 2.1.2

* Fix gh-issue #32: JSON compatibility with PHP-7.1
* Fix pq\DateTime::createFromFormat() prototype with PHP-7.2
+ Update static pq\Types with PostgreSQL-9.6 types

v2.1.1: Release 2.1.1

 * Fix build with PostgreSQL < 9.3
 * Fix required PHP version in package.xml