Add: integer_to_roman

[awesee]

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[codecov-io]

Codecov Report

Merging #105 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #105   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          44     45    +1     
  Lines         492    501    +9     
=====================================
+ Hits          492    501    +9

Impacted Files	Coverage Δ
problems/integer-to-roman/integer_to_roman.go	100% <100%> (ø)

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