chore(release): version bump and changelog for 1.3.0.
doc(frameworks): Change interface contract of the protractor runner instance so that it returns a promise instead of calling a callback function
feat(runner/frameworks): Make each test framework runner return a promise and handle it from the Runner class
feat(launcher): Improve log_() to make it able to log multiple values instead of only one
feat(launcher): Log error stack trace if possible, revert to basic error otherwise