Examples need fixing

[PallHaraldsson]

I know they were ok, as I fixed them at some point, but it's not enough to go back to that revision:

Pkg.add(PackageSpec(url="https://github.com/plotly/Dash.jl.git", rev="b302856"))

I DO have:

(@v1.5) pkg> st Dash
Status `~/.julia/environments/v1.5/Project.toml`
  [1b08a953] Dash v0.1.0 `https://github.com/plotly/Dash.jl.git#master`

still got/get:

julia> Pkg.add(PackageSpec(url="https://github.com/plotly/Dash.jl.git", rev="dev"))
   Updating git-repo `https://github.com/plotly/Dash.jl.git`
  Resolving package versions...
ERROR: Unsatisfiable requirements detected for package CodecZlib [944b1d66]:
 CodecZlib [944b1d66] log:
 ├─possible versions are: [0.4.4, 0.5.0-0.5.2, 0.6.0, 0.7.0] or uninstalled
 ├─restricted to versions 0.7 by Dash [1b08a953], leaving only versions 0.7.0
 │ └─Dash [1b08a953] log:
 │   ├─possible versions are: 0.1.0 or uninstalled
 │   └─Dash [1b08a953] is fixed to version 0.1.0
 └─restricted by compatibility requirements with CSVFiles [5d742f6a] to versions: [0.5.2, 0.6.0] — no versions left
   └─CSVFiles [5d742f6a] log:
     ├─possible versions are: [0.9.0-0.9.1, 0.10.0, 0.11.0, 0.12.0, 0.13.0, 0.14.0, 0.15.0, 0.16.0-0.16.1, 1.0.0] or uninstalled
     └─restricted to versions 1 by Queryverse [612083be], leaving only versions 1.0.0
       └─Queryverse [612083be] log:
         ├─possible versions are: 0.6.3 or uninstalled
         └─Queryverse [612083be] is fixed to version 0.6.3-DEV

[PallHaraldsson]

#59