Update activate.fish
Update activate.fish

replaced . bin/activate.fish with source bin/activate.fish, because of this:
marcel@marcel ~> .
source: '.' command is deprecated, and doesn't work with STDIN anymore. Did you mean 'source' or './'?
(1) marcel@marcel ~>
madprog/virtualenv,ionelmc/virtualenv,Seha16/virtualenv,ionelmc/virtualenv,ionelmc/virtualenv,vvtam/virtualenv,RAS-ViVa/virtualenv,jedie/virtualenv,jedie/virtualenv,Lyleo/virtualenv,kissthink/virtualenv,techtonik/virtualenv,RAS-ViVa/virtualenv,haridsv/virtualenv,Ivoz/virtualenv,davidszotten/virtualenv,mykemunson/virtualenv,mykemunson/virtualenv,vvtam/virtualenv,francatore/virtualenv,bigplus/virtualenv,Seha16/virtualenv,Ivoz/virtualenv,blueyed/virtualenv,Lyleo/virtualenv,blueyed/virtualenv,madprog/virtualenv,francatore/virtualenv,techtonik/virtualenv,dstufft/virtualenv,bigplus/virtualenv,davidszotten/virtualenv,dstufft/virtualenv,haridsv/virtualenv,kissthink/virtualenv