Why is Julia so outdated?

[Thomas Ruedas]

As the Julia programming language has recently received some attention, 
I thought of giving it a try and wanted to install it from Macports. 
However, the Macports version (0.6.2) is outdated by some 2 years; the 
current version according to the Julia homepage is v.1.1.1, with newer 
releases apparently already on the horizon. Is there a reason why Julia 
is not being kept up to date?
Thomas