julia> using Pkg
julia> Pkg.add("PenultimateDays")
Updating registry at `~/.julia/registries/General.toml`
Resolving package versions...
Installed PenultimateDays ─ v0.1.0
Updating `~/work/PenultimateDays.jl/PenultimateDays.jl/docs/Project.toml`
[556d87f4] ~ PenultimateDays v0.1.0 `~/work/PenultimateDays.jl/PenultimateDays.jl` ⇒ v0.1.0
Updating `~/work/PenultimateDays.jl/PenultimateDays.jl/docs/Manifest.toml`
[556d87f4] ~ PenultimateDays v0.1.0 `~/work/PenultimateDays.jl/PenultimateDays.jl` ⇒ v0.1.0
Precompiling project...
✓ PenultimateDays
1 dependency successfully precompiled in 1 seconds. 7 already precompiled.