pkg> registry add https://github.com/0h7z/0hjl.git
pkg> add Exts
julia> using Exts
julia> ODict(Exts.ext(:)) # to see which extensions are loaded
OrderedDict{Symbol, Union{Nothing, Module}} with 5 entries:
:BaseExt => Exts.BaseExt
:DataFramesExt => DataFramesExt
:FITSIOExt => FITSIOExt
:StatisticsExt => StatisticsExt
:YAMLExt => YAMLExt