update amphp/postgres version & enable testing

Author: mmasiukevich

Diff for: composer.json

@@ -59,7 +59,7 @@
     "boesing/psalm-plugin-stringf": "v1.1.*"
   },
   "prefer-stable": true,
-  "minimum-stability": "dev",
+  "minimum-stability": "stable",
   "scripts": {
     "psalm": "rm -rf ~/.cache/psalm/ && ./vendor/bin/psalm --config=psalm.xml",
     "phpstan": "./vendor/bin/phpstan analyse src --level 9",

Diff for: phpstan.neon

@@ -3,5 +3,4 @@ parameters:
 	checkGenericClassInNonGenericObjectType: false
 	ignoreErrors:
 		- '#Cannot cast mixed to int#'
-		- '#Access to undefined constant ServiceBus\\Storage\\Sql\\Migration\\MigrationType(.*)#'
-		- '#Access to an undefined property ServiceBus\\Storage\\Sql\\Migration\\MigrationType(.*)#'
+		- '#Access to .* ServiceBus\\Storage\\Sql\\Migration\\MigrationType(.*)#'

Diff for: phpunit.xml

@@ -39,9 +39,4 @@
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
-    <groups>
-        <exclude>
-            <group>amphp</group>
-        </exclude>
-    </groups>
 </phpunit>

Diff for: tests/Sql/AmpPostgreSQL/AmpPostgreSQLTransactionTest.php

@@ -50,7 +50,7 @@ public static function tearDownAfterClass(): void
         $adapter = self::getAdapter();
 
         wait(
-            $adapter->execute('DROP TABLE test_result_set')
+            $adapter->execute('DROP TABLE IF EXISTS test_result_set')
         );
     }