Fix tab access for Safari 14
Fix tab access for Safari 14

Safari 14 sticks AXTabs into normal AXGroup, not an AXTabGroup
Fixed focusTab to follow lua style indexing (1 based)

latenitefilms/hammerspoon,asmagill/hammerspoon,asmagill/hammerspoon,cmsj/hammerspoon,CommandPost/CommandPost-App,latenitefilms/hammerspoon,Habbie/hammerspoon,cmsj/hammerspoon,latenitefilms/hammerspoon,Habbie/hammerspoon,latenitefilms/hammerspoon,cmsj/hammerspoon,cmsj/hammerspoon,asmagill/hammerspoon,Habbie/hammerspoon,latenitefilms/hammerspoon,asmagill/hammerspoon,latenitefilms/hammerspoon,Hammerspoon/hammerspoon,Hammerspoon/hammerspoon,Hammerspoon/hammerspoon,Hammerspoon/hammerspoon,CommandPost/CommandPost-App,CommandPost/CommandPost-App,Habbie/hammerspoon,Hammerspoon/hammerspoon,asmagill/hammerspoon,asmagill/hammerspoon,Hammerspoon/hammerspoon,cmsj/hammerspoon,cmsj/hammerspoon,CommandPost/CommandPost-App,CommandPost/CommandPost-App,Habbie/hammerspoon,CommandPost/CommandPost-App,Habbie/hammerspoon