v1.1.0

This release removes support for Elixir 1.13.

• Updates
  • Add NervesSSH.add_subsystem/2 and NervesSSH.remove_system/2 for managing subsystems at runtime. @bjyoungblood
  • Clarify licensing and copyrights to become REUSE compliant
  • Minor updates to fix Elixir 1.19 warnings