test/support/helpers/platform: onMacOSAtLeast & onMacOSAtMost
test/support/helpers/platform: onMacOSAtLeast & onMacOSAtMost

To make platform-specific tests easier.

nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop