This backports the changes done in master in 5d8819f but tries to avoid changing the interface through the use of a class method #call and a Dry::Validation::Result wrapping class using SimpleDelegator that defines #messages.

I ran into this issue when testing where ebnf 2.0 was released on Friday and was getting pulled in.  The only version of linkeddata which resolves then is 1.1.1 which has compatibility issues with rdf 3.x.  If ebnf is backed down to 1.x then I believe the correct version of linkeddata will be used but specifying the version of linkeddata better describes the true dependency requirement.