@simensen What do you think about this addition to composer.

This represents any version of 2.X.Y . 

One of the question to address is

if I add `"aura/di": "2.0.*@dev",` in https://github.com/auraphp/Aura.Web_Kernel/blob/develop-2/composer.json#L16

or in https://github.com/auraphp/Aura.Web_Project/blob/develop-2/composer.json#L18

the aura/di version that to be installed is the one represented in the Web_Project or Web_Kernel , and not that of Project_Kernel.

`Aura.Project_Kernel` depends on `Aura.Di`
`Aura.Web_Kernel` depends on `Aura.Project_Kernel`
`Aura.Web_Project` depends on `Aura.Web_Kernel` which in turn is dependent on `Aura.Di` ( but if I changed the version in Web_Project 's composer.json it should install the one defined in lower level )

Let me know if you need any information.

Thanks in advance.