Changes:

• Updated Appium to version 2.18.0
• Updated Appium driver: appium-espresso-driver@4.1.5
• Updated Appium driver: appium-flutter-driver@2.15.0
• Updated Appium driver: appium-flutter-integration-driver@1.1.4
• Updated Appium driver: appium-geckodriver@1.4.3
• Updated Appium driver: appium-uiautomator2-driver@4.2.3