feat: add helper for Icelandic language

[merelyAnna]

fix #36 : Add a helper method for Icelandic language

Proposed changes

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Types of changes

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• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
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Checklist

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[codecov-io]

Codecov Report

Merging #52 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #52   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          46     47    +1     
  Branches        3      3           
=====================================
+ Hits           46     47    +1

Impacted Files	Coverage Δ
src/index.js	100% <100%> (ø)	:arrow_up:

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[merelyAnna]

@chgasparoto Changed the things as requested

[chgasparoto]

@merelyAnna still missing check the item on line 180 on README.md file :)

[merelyAnna]

@chgasparoto facepalm Of course. Sorry. Fixed it. :)

[chgasparoto]

@merelyAnna I just merged other PR into master. Could you please fix the conflict?

[merelyAnna]

@chgasparoto Done :)

[chgasparoto]

:tada: This PR is included in version 1.13.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: