Fix missing values

[guilhermebodin]

No description provided.

[codecov]

Codecov Report

Merging #300 (e0167e5) into master (e9b744b) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #300      +/-   ##
==========================================
+ Coverage   92.96%   93.06%   +0.09%     
==========================================
  Files          35       35              
  Lines        3199     3286      +87     
==========================================
+ Hits         2974     3058      +84     
- Misses        225      228       +3     

Impacted Files	Coverage Δ
src/models/common.jl	95.45% <100.00%> (+3.14%)	⬆️
src/models/dar.jl	96.66% <100.00%> (+0.11%)	⬆️
src/models/exponential_smoothing.jl	100.00% <100.00%> (ø)
src/models/locallevelcycle.jl	100.00% <100.00%> (ø)
src/models/locallevelexplanatory.jl	100.00% <100.00%> (ø)
src/models/locallineartrend.jl	100.00% <100.00%> (ø)
src/models/naive_models.jl	100.00% <100.00%> (ø)
src/models/unobserved_components.jl	88.80% <100.00%> (+0.13%)	⬆️
src/models/sarima.jl	96.17% <0.00%> (-0.13%)	⬇️
src/optimizers.jl	100.00% <0.00%> (ø)
... and 22 more

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