Captain Lawrence Shankland kept Hearts firmly on course for Premiership glory as they all but eliminated one of their two main rivals from contention by coming from behind to defeat Rangers 2-1 at a frenzied Tynecastle. The Gers arrived in Edinburgh four points off the pace and it looked like they might be about to blow the three-way battle for the championship wide open when they led at the break through Dujon Sterling’s deflected effort. But Hearts, having been outplayed for long periods of the first half, regrouped at the break and turned the game around through goals from Stephen Kingsley and Shankland. The buoyant Jambos – who have won each of their last three games – are now three points ahead of second-placed Celtic with a superior goal difference and a whopping seven clear of Gers, with just three games remaining of this compelling Scottish title race.…