Merge pull request #4319 from morozov/psalm-4

lib/Doctrine/DBAL/Connection.php

lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php

lib/Doctrine/DBAL/Driver/ResultStatement.php

lib/Doctrine/DBAL/DriverManager.php

lib/Doctrine/DBAL/Query/QueryBuilder.php

lib/Doctrine/DBAL/SQLParserUtils.php

phpstan.neon.dist

psalm.xml

tests/Doctrine/Tests/DBAL/ConfigurationTest.php

tests/Doctrine/Tests/DBAL/ConnectionTest.php

...ne/Tests/DBAL/Functional/Driver/Mysqli/ConnectionTest.php

tests/Doctrine/Tests/DBAL/Functional/ResultCacheTest.php

.../Tests/DBAL/Functional/Schema/OracleSchemaManagerTest.php

tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php

...s/Doctrine/Tests/DBAL/Platforms/SQLServerPlatformTest.php

tests/Doctrine/Tests/DBAL/Schema/ComparatorTest.php

.../Doctrine/Tests/DBAL/Sharding/PoolingShardManagerTest.php