bump to 0.4.3

Merge pull request #43 from centrifugal/docker-compose-tests

Use docker compose for integration tests, add missing tests, fix resubscribe bug

Update __meta__.py - 0.4.2

Merge pull request #38 from centrifugal/fix_leaks

fix example

fix state transitions

fix state transitions

cancel resubscribe timer

cancel refresh timer, cancel background tasks on disconnect

cancel reconnect timer before making new one

asyncio lock for connection creation

Update __meta__.py - 0.4.1

Merge pull request #36 from centrifugal/protobuf_v6

test with protobuf v6