Make sure you've installed Julia 1.8 or greater. From the Julia REPL:
julia> ]
Pkg> add https://github.com/semiotic-ai/SemioticOpt.jl
To specify a version, use
julia> ]
Pkg> add https://github.com/semiotic-ai/SemioticOpt.jl#v0.1.0
See CITATION.bib
for the relevant reference(s).