Add more logic to processDependencies()
Add more logic to processDependencies()

- if I already have the latest release of a package, remove the
dependency
- throw an exception if a required version cannot be found in the GPM
yet

JamesPan/gravbox,sylvestrelucia/grav,stell/grav,JamesPan/gravbox,sylvestrelucia/grav,sylvestrelucia/grav,shortsofia/testesitegrav.github.io,Sommerregen/grav,tomzx/blog.tomrochette.com,joeyhenricks/a-broke-vegan,userfrosting/learn,notklaatu/grav,dimayakovlev/grav,userfrosting/learn,userfrosting/learn,sylvestrelucia/grav,tomzx/blog.tomrochette.com,webuxr/iamrs,notklaatu/grav,dimayakovlev/grav,toovy/grav,JamesPan/gravbox,toovy/grav,tomzx/blog.tomrochette.com,Vivalldi/grav,getgrav/grav,getgrav/grav,gigago/grav,ccardinaux/grav-test,JamesPan/gravbox,joeyhenricks/a-broke-vegan,userfrosting/learn,Vivalldi/grav,tomzx/blog.tomrochette.com