Updated Selenium to 3.10.0 in Travis.
Updated Selenium to 3.10.0 in Travis.

emanlove/robotframework-selenium2library,robotframework/SeleniumLibrary,emanlove/robotframework-selenium2library,robotframework/SeleniumLibrary,robotframework/SeleniumLibrary,rtomac/robotframework-selenium2library,emanlove/robotframework-selenium2library,rtomac/robotframework-selenium2library,rtomac/robotframework-selenium2library