Add the update to Gherkin v4.0 to History.md.
Add the update to Gherkin v4.0 to History.md.

richarda/cucumber,enkessler/cucumber-ruby,richarda/cucumber,cucumber/cucumber-ruby,twalpole/cucumber,phoebeclarke/cucumber-ruby,twalpole/cucumber,cucumber/cucumber-ruby,enkessler/cucumber-ruby,enkessler/cucumber-ruby,phoebeclarke/cucumber-ruby,cucumber/cucumber-ruby