Update Mac installer to latest package versions#36

Merged

danielbair merged 4 commits intosillsdev:masterfrom danielbair:master

Aug 18, 2019

+86-56

Commits on Aug 14, 2019

Update to latest ffmpeg and numpy
danielbair
committed

Commits on Aug 15, 2019

Update for latest versions
danielbair
committed

Commits on Aug 16, 2019

Update for latest Homebrew packages
danielbair
committed

Commits on Aug 18, 2019

Updated to 1.7.3_1
danielbair
committed