Errors Running the Example

[andreeco]

I run the example (README.md) and got this error message:

julia> ┌ Error: KeyError: key Dates not found
│ Stacktrace:
│   [1] getindex
│     @ ./iddict.jl:98 [inlined]
│   [2] macro expansion
│     @ ./lock.jl:273 [inlined]
│   [3] root_module_key(m::Module)
│     @ Base ./loading.jl:2420
│   [4] serialize_mod_names(s::Serialization.Serializer{IOBuffer}, m::Module)
│     @ Serialization ~/.julia/juliaup/julia-1.11.6+0.x64.linux.gnu/share/julia/stdlib/v1.11/Serialization/src/Serialization.jl:390
[...]

Adding using Dates at the top solves this.

Also when I played around a little I got this error message and the app is frozen.

`Task started
┌ Error: ErrorException("cannot serialize a running Task")
└ @ Stipple ~/.julia/dev/Stipple.jl/src/Stipple.jl:805

Thanks for review.