Fix for too large header size.

Merge pull request #51 from jacekbarecki-westwing/issue-50

[50] Fix for "Library error: table too large for buffer" error

Add exchange getter in publisher

Merge pull request #47 from gwoj/0.3

Exchange getter

Original headers and corrected example

Merge pull request #46 from anhchienhoang/correct-docs

Correct docs

Connection timeout bugfix

Connection timeout bugfix

Compatibility with Symfony 4.2+

Compatibility with Symfony 4.2+

Fixed errors from #43

Fixed missing array keys from #43

Pass config interface to builder instead of implementation

Pass interface instead of actual implementation

Allows for bypassing the current configuration physical implementation by providing your own implementation.

Disable heartbeat

Since heartbeat has only a partial implementation and since the default behavior changed when heartbeat is not set (it is set automatically to 10), this disables heartbeat for all values < 1

Deprecated stuff

Deprecated stuff

Symfony 3 compatibility

Symfony 3 compatibility