MDL-48030 behat: Updated composer to use latest behat version
Merge pull request #10 from rajeshtaneja/dev-48030

MDL-48030 behat: Updated composer to use latest behat version
MDL-48190 behat: Fixed visitbackground in MoodleScenarioTester
MDL-48190 behat: php version updated to match moodle requirement
MDL-46891 behat: Minimum changes to support behat 3