os/mac/version: use named captures in regex
os/mac/version: use named captures in regex

vitorgalvao/brew,vitorgalvao/brew,JCount/brew,MikeMcQuaid/brew,EricFromCanada/brew,vitorgalvao/brew,claui/brew,nandub/brew,claui/brew,nandub/brew,sjackman/homebrew,MikeMcQuaid/brew,sjackman/homebrew,sjackman/homebrew,JCount/brew,vitorgalvao/brew,claui/brew,nandub/brew,EricFromCanada/brew,EricFromCanada/brew,Homebrew/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,claui/brew,Homebrew/brew,nandub/brew,Homebrew/brew,JCount/brew,Homebrew/brew,sjackman/homebrew,JCount/brew,EricFromCanada/brew