As the other comments point out, it's hyperbole. It's also an aspirational statement.

Aspirational, as in, they wish that github would be the key factor in human progress. Maybe I can say that even plainer: to the leadership at github, the progress of the human race depends on github.

The open source community depends on github.

That's what it's implying.

(The reader is left to identify that as wishful thinking.)