func CreateFromMonthAndYear

[sametaylak]

Closes #20

[codecov-io]

Codecov Report

Merging #44 into master will increase coverage by 0.04%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #44      +/-   ##
==========================================
+ Coverage   91.48%   91.53%   +0.04%     
==========================================
  Files           3        3              
  Lines         857      862       +5     
==========================================
+ Hits          784      789       +5     
  Misses         48       48              
  Partials       25       25

Impacted Files	Coverage Δ
carbon.go	92.53% <100%> (+0.04%)	⬆️

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[hfcorreia]

Nice Job! @sametaylak