Update webmock dependency to version 1.7.7
Update webmock dependency to version 1.7.7

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