chore: add custom headers AMQP

Merge pull request #111 from sergiy-petrov/sergiy-petrov-patch-1

PHP 8.1 support

Merge pull request #107 from bluefyn-international/fix/batch-publishing

Update Amqp.php

Removed static typing of property to make it backward compatible

Merge pull request #98 from Cellard/master

Consumer properties

Merge pull request #89 from slowpokefarm/master

using Config Repository contract to allow custom config repositories in Context

Merge pull request #70 from softonic/master

Allow multiple queue bindings

Bump phpamqplib version to at least 2.9

Revert change in #64 and fix unexpected array issue.

* #64 is still fixed with the is_array check
* The used defaults should be compatible now

array_key_exists() expects parameter 2 to be array, null given in Con…

…text.php line 76

Bugfix
array_key_exists() expects parameter 2 to be array, null given in Context.php line 76