**Changes:**
* Now `connect()` method call of `Connection` class blocks until connected
even if another `connect()` is happening in parallel. This resolves issue
of cancelled coroutines if one tries to connect in parallel coroutines.
**Bugs fixed:**
* Connect hanged indefinitely if asynctnt was accidentally disconnected from
Tarantool and TCP connection was still alive for a moment while trying to
reconnect ([8](https://github.com/igorcoding/asynctnt/issues/8)).
* Connect to LOADING Tarantool instance without username/password resulted in
exception NO_SUCH_SPACE ([10](https://github.com/igorcoding/asynctnt/issues/10)).