Dependency injection for custom configuration

[kievan]

• add custom Configuration dependency injection
• relevant files code clean up and style
• tests passing

[kievan]

Hi @Kern046,

Since I see no way to make the build happy - either tests will fail with php 7.0, or php 7.2, I thought a forward looking decision is to exclude the php 7.0 version and use the phpunit >= 7.

If I missed a way to fix tests in a way that would satisfy php 7.0, 7.1 and 7.2 please point it out.

Thanks

[Kern046]

Hi,

I deeply apologize for my silence, it has been a very busy year for me and it's only the beginning !

I plan to make a refacto of this library to allow easier custom implementations, I'll keep you updated about it ! I need to get myself back in to make the best decisions about PHP versions support and the correct way to implement proper patterns in the library, but I'll take some time to do it in the next few days.

Sorry once again for the late response, and thanks for your PR !