Merge branch 'release/0.3.4' into develop

* release/0.3.4:
  update version
edit gemspec
add string input
add tests for max and min for languages
Merge branch 'feature/string_input' into develop

* feature/string_input:
  add tests for max and min for languages
  add string input
fix string input
add more tests
add interfaces to readme
update version
Merge branch 'release/0.3.5'

* release/0.3.5:
  update version
  add interfaces to readme
  add more tests
  fix string input
  add tests for max and min for languages
  add string input
  edit gemspec