Remove admin plugin as dependency

[bitstarr]

I want to be able to run a grav website on production server without the admin interface (for security e.g.).
When I run:

./bin/gpm selfupgrade
./bin/gpm update

or

./bin/grav install

it will force the installation of the admin plugin.

Please remove this dependency, as flex-objects is capable to work without it.

[w00fz]

You are right this is not a dependency, what we need is for a way for resources to be able to specify satisfactory version requirements of other resources, without necessary turning them into their own dependencies.

In this case Flex Objects was trying to ensure that if you had Admin installed, it was running at least version X, unfortunately this in turn made Admin a dependency of Flex Objects.

[bitstarr]

I think there should still be a way to note the minimum version of the admin plugin. This seems to be critical. But maybe there should be a check for this in the code of flex objects. Something that displays a message in the admin like 'This version of admin is not compatible with the current version of flex objects. Please update'