Update gherkin dependency to version 2.3.8
Update gherkin dependency to version 2.3.8

fxposter/travis-ci,openeducation/travis-ci,flores/travis-ci,flores/travis-ci,fxposter/travis-ci,openeducation/travis-ci,flores/travis-ci,openeducation/travis-ci,fxposter/travis-ci