fix: do not assume `AbstractVectorOfArray` is mutable in `Base.zero`#409

ChrisRackauckas merged 3 commits intoSciML:masterSciML/RecursiveArrayTools.jl:masterfrom

AayushSabharwal:as/immutable=zeroAayushSabharwal/RecursiveArrayTools.jl:as/immutable=zeroCopy head branch name to clipboard