Dx/tests

[williamespindola]

this is not something to merge, it comes from my fork but that I don’t maintain : https://github.com/mathroc/rabbitmq-service-provider

there’s a few thing you could integrate if you’d like:

• updated readme
• cleaned up file organization
• update composer.json (remove support for EOL php and update deps version constraints)
• maybe a few diff in file that I moved. I don’t remember if I only moved them or if they changed a bit (github doesn’t make it easy to diff those file and I’m too lazy to do it manually now)

obviously you don’t want to rename the namespace to TH\