Tests fail on 32-bit with MOI 0.9.15

[mlubin]

https://ci.appveyor.com/project/mlubin/jump-jl/builds/35204486/job/c923j4nq90vjeoet#L137

 MethodError: no method matching MathOptInterface.Utilities.CleverDicts.State(::Int32)
  Closest candidates are:
    MathOptInterface.Utilities.CleverDicts.State(!Matched::Int64) at C:\Users\appveyor\.julia\packages\MathOptInterface\R1y80\src\Utilities\CleverDicts.jl:266
    MathOptInterface.Utilities.CleverDicts.State(!Matched::Int64, !Matched::UInt64) at C:\Users\appveyor\.julia\packages\MathOptInterface\R1y80\src\Utilities\CleverDicts.jl:267
  Stacktrace:
   [1] iterate(::MathOptInterface.Utilities.CleverDicts.CleverDict{MathOptInterface.VariableIndex,MathOptInterface.VariableIndex,typeof(MathOptInterface.index_value),typeof(MathOptInterface.Utilities._index_to_variable)}) at C:\Users\appveyor\.julia\packages\MathOptInterface\R1y80\src\Utilities\CleverDicts.jl:282
   [2] _reverse_dict at C:\Users\appveyor\.julia\packages\MathOptInterface\R1y80\src\Utilities\cachingoptimizer.jl:168 [inlined]
   [3] _reverse_index_map(::MathOptInterface.Utilities.IndexMap) at C:\Users\appveyor\.julia\packages\MathOptInterface\R1y80\src\Utilities\cachingoptimizer.jl:162
   [4] attach_optimizer(::MathOptInterface.Utilities.CachingOptimizer{MathOptInterface.AbstractOptimizer,MathOptInterface.Utilities.UniversalFallback{MathOptInterface.Utilities.Model{Float64}}}) at C:\Users\appveyor\.julia\packages\MathOptInterface\R1y80\src\Utilities\cachingoptimizer.jl:155
   [5] attach_optimizer(::Model) at C:\projects\jump-jl\src\optimizer_interface.jl:32
   [6] macro expansion at C:\projects\jump-jl\test\callbacks.jl:20 [inlined]
...

[odow]

This is a MOI issue.