Bumping version to 1.15.7
Bumping version to 1.15.7

neomadara/rails_best_practices,railsbp/rails_best_practices,beanieboi/rails_best_practices,railsbp/rails_best_practices,andela-iokonkwo/rails_best_practices,railsbp/rails_best_practices,neomadara/rails_best_practices,flyerhzm/rails_best_practices,neomadara/rails_best_practices,beanieboi/rails_best_practices,beanieboi/rails_best_practices,andela-iokonkwo/rails_best_practices,andela-iokonkwo/rails_best_practices,flyerhzm/rails_best_practices