merge a collection of named tuples

[BeastyBlacksmith]

At the moment merge can merge only two named tuples at a time. It would be good to extend this to allow for collections of named tuples.

[dylanfesta]

It seems they implemented it starting from Julia 1.1
https://docs.julialang.org/en/v1/base/collections/#Base.merge

funnily enough I could not understand how to concatenate named tuples, before stumbling on this issue. There is no mention of merge in the documentation related to NamedTuple