en_GB instances

[etspaceman]

Changes Introduced

en_GB instances have been added

Applicable linked issues

Makes progress towards #8

Checklist (check all that apply)

• This change maintains backwards compatibility
• I have introduced tests for all new features and changes
• I have added documentation covering all new features and changes
• This pull-request is ready for review

[codecov]

Codecov Report

Merging #19 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #19   +/-   ##
=======================================
  Coverage   99.18%   99.18%           
=======================================
  Files          86       86           
  Lines         491      493    +2     
=======================================
+ Hits          487      489    +2     
  Misses          4        4           

Impacted Files	Coverage Δ
src/main/scala/faker/Faker.scala	97.91% <100.00%> (+0.02%)	⬆️
src/main/scala/faker/ResourceLoader.scala	90.00% <100.00%> (+0.52%)	⬆️
src/main/scala/faker/address/DefaultCountry.scala	100.00% <100.00%> (ø)
src/main/scala/faker/address/State.scala	100.00% <100.00%> (ø)

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