fix: accept Integer as weights in config

[daschw]

If I set

config:
  optimization:
    snapshots:
      weights: 1

in the IESopt config yaml, I get the following error:

┌ Error: Error(s) during model generation
│   debug = "not available"
│   number_of_errors = 1
│    = = = = = = = = = [ Error #1 ] = = = = = = = = =
│    MethodError: Cannot `convert` an object of type
│      Int64 to an object of type
│      Union{Float64, String}
│ 
│    Closest candidates are:
│      convert(::Type{T}, ::T) where T
│       @ Base Base.jl:84
│ 
│    Stacktrace:
│     [1] IESopt._ConfigSnapshots(count::Int64, offset::Int64, names::Nothing, weights::Int64, representatives::Nothing, aggregate::Nothing)
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\config\optimization.jl:9
│     [2] IESopt._ConfigSnapshots(config::Dict{String, Any})
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\config\optimization.jl:86
│     [3] IESopt._ConfigOptimization(config::Dict{String, Any})
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\config\optimization.jl:47
│     [4] IESopt._Config(model::JuMP.Model)
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\config\config.jl:45
│     [5] _parse_model!(model::JuMP.Model, filename::String, global_parameters::Dict{String, Any}; verbosity::Nothing)
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\parser.jl:11
│     [6] parse!(model::JuMP.Model, filename::String; verbosity::Nothing, kwargs::@Kwargs{weight::Int64})
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\IESopt.jl:511
│     [7] generate!(model::JuMP.Model, filename::String; verbosity::Nothing, kwargs::@Kwargs{weight::Int64})
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\IESopt.jl:325
│     [8] run(filename::String; verbosity::Nothing, kwargs::@Kwargs{weight::Int64})
│       @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\IESopt.jl:279
└ @ IESopt C:\Users\SchwabenederD\.julia\dev\IESopt\src\IESopt.jl:365

This change fixes this and also allows integers in the weigths config.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.45%. Comparing base (911d03d) to head (163b1ef).
Report is 2 commits behind head on main.

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   52.42%   52.45%   +0.02%     
==========================================
  Files          99       99              
  Lines        3792     3794       +2     
==========================================
+ Hits         1988     1990       +2     
  Misses       1804     1804              

Files with missing lines	Coverage Δ
src/config/optimization.jl	92.00% <100.00%> (+0.69%)	⬆️

[sstroemer]

Looks good!