If by "that guy" you mean by far the best performer in a completely disfunctional team (which is poison for a striker) and the difference maker between relegation batte and the international places last season, a guy who went through a tremendous development jump in that time, then yes.
The source for that bid is by the way Freddie Röckenhaus, the most reliable journalist in terms of Dortmund. If that guy states concrete numbers, he is guaranteed to be backed up by first grade sources inside the club.
Aubameyang has been our life insurance for quite a while now and there is no indication (his current early form is stellar) that he won´t continue to be a top performer of the squad.
And to be completely honest, in a world where a good offensive allrounder like Firmino is worth 40 Mil. €, Aubameyang in his current contract situation is worth more than 50.