Update authors list

[fonsp]

Try this Pull Request!

Open Julia and type:

julia> import Pkg
julia> Pkg.activate(temp=true)
julia> Pkg.add(url="https://github.com/JuliaPluto/Pluto.jl", rev="update-authors-list")
julia> using Pluto

[fonsp]

@pankgeorg Can you check your preferred spelling? You can merge when you're done

[pankgeorg]

Μου φαίνεται πολύ καλό! ΜΦΠΚ (lgtm)