Revert "Properly (de)serialize VersionSpec to JSON"

[giordano]

Reverts #93. It breaks registration of LLVM: https://dev.azure.com/JuliaPackaging/Yggdrasil/_build/results?buildId=8363&view=logs&j=82ede541-d8dc-5eb8-fd6b-5903678e9282&t=31eefa9e-75b0-5107-6058-36e5c2f2fd84

    Updating registry at `/depot/registries/General`
Downloading sources...
ERROR: LoadError: KeyError: key "ranges" not found
Stacktrace:
  [1] getindex
    @ ./dict.jl:482 [inlined]
  [2] dejson(#unused#::Type{Pkg.Types.VersionSpec}, d::Dict{String, Any})
    @ BinaryBuilderBase /depot/packages/BinaryBuilderBase/OykWl/src/Dependencies.jl:130
  [3] dependencify(d::Dict{String, Any})
    @ BinaryBuilderBase /depot/packages/BinaryBuilderBase/OykWl/src/Dependencies.jl:138
  [4] _broadcast_getindex_evalf
    @ ./broadcast.jl:648 [inlined]
  [5] _broadcast_getindex
    @ ./broadcast.jl:621 [inlined]
  [6] getindex
    @ ./broadcast.jl:575 [inlined]
  [7] copy(bc::Base.Broadcast.Broadcasted{Base.Broadcast.DefaultArrayStyle{1}, Tuple{Base.OneTo{Int64}}, typeof(BinaryBuilderBase.dependencify), Tuple{Vector{Any}}})
    @ Base.Broadcast ./broadcast.jl:922
  [8] materialize
    @ ./broadcast.jl:883 [inlined]
  [9] cleanup_merged_object!(meta::Dict{Any, Any})
    @ BinaryBuilder /depot/packages/BinaryBuilder/yQq4Z/src/Declarative.jl:33
 [10] top-level scope
    @ /agent/_work/1/s/.ci/download_sources.jl:14
in expression starting at /agent/_work/1/s/.ci/download_sources.jl:14

CC: @fingolfin

[fingolfin]

Huh, weird -- can one see the meta.json that got used there somehow?

[giordano]

I guess you can create it with build_tarballs.jl --meta-json=meta.json on https://github.com/JuliaPackaging/Yggdrasil/blob/6c42c61fe54480158d723e8cb5c06d73f4a30768/L/LLVM/libLLVM%4011.0.0/build_tarballs.jl