Invalid composer data reported by packagist

[Mark Lambley]

The mhetreramesh/flysystem-backblaze package of which you are a maintainer has failed to update due to invalid data contained in your composer.json. Please address this as soon as possible since the package stopped updating.

It is recommended that you use composer validate to check for errors when you change your composer.json.

$ composer validate

  [RuntimeException]
  require.mikey179/vfsStream is invalid, it should not contain uppercase characters. 
  Please use mikey179/vfsstream instead.

[Mark Lambley]

#29