Create an option to ignore tags with Array of string

[alexcanessa]

Resolve #92

[codecov-io]

Codecov Report

Merging #105 into master will decrease coverage by 0.11%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #105      +/-   ##
==========================================
- Coverage   80.95%   80.83%   -0.12%     
==========================================
  Files           7        7              
  Lines         357      360       +3     
==========================================
+ Hits          289      291       +2     
- Misses         68       69       +1

Impacted Files	Coverage Δ
lib/_options.js	71.42% <0%> (-11.91%)	⬇️
lib/src/Gren.js	78.68% <100%> (+0.17%)	⬆️

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