Updating Julia should be easy. The easier it is, the more likely folks will develop with the latest versions, and the less friction we will have with fast paced language development.
The situation is summed up quite well in this concise question and its first answer
jill.py, but one of the great attractions of julia is that it is self contained.
Introducing UpdateJulia — a simple cross platform julia installer!
]add UpdateJulia using UpdateJulia update_julia()