v0.7.0

• Added support for prepared statements (Tarantool 2.3.2+) (example)
• Added generic Client::execute() method to execute dynamic SQL statements whose type (query or update) is unknown
• Dropped nullable return type from SqlUpdateResult::getAutoincrementIds(), now it always returns an array
• Dropped nullable return type from Connection::open(), now it always returns the Greeting object
• Added unknown(), equals() and getServerVersion() to the Greeting class, removed getServerVersionId()
• Added optional second argument $packer to Client::fromOptions() and Client::fromDsn()
• Bumped rybakit/msgpack requirement to ^0.7, if ext-decimal extension is enabled, overflowed integers will now be automatically converted to Decimal\Decimal
• Renamed bitwise methods in the Operations class, e.g. Operations::bitOr() → Operations::bitwiseOr()
• Added Keys::SQL_INFO_ROW_COUNT and Keys::SQL_INFO_AUTO_INCREMENT_IDS
• Added Psalm, a static analysis tool for PHP
• Added more tests and usage examples