#5: remove hidden files from discovery

[davidferlay]

Working fine :ok_hand:

• before

  ➜ ./launchr_Linux_x86_64 discover 
  compose.build.platform:build
  compose.build.platform:compare-artifact
  compose.build.platform:components-update-propagate
  compose.build.platform:test
  platform:build
  platform:compare-artifact
  platform:components-update-propagate
  platform:test

• after

  ➜ ./launchr_Linux_x86_64 discover 
  platform:build
  platform:compare-artifact
  platform:components-update-propagate
  platform:test