v1.11.0

This release updates Buildroot to 2020.02 and upgrades gcc from 8.3 to 9.2.
While this is a minor version bump due to the Buildroot release update, barring
advanced usage of Nerves, this is a straightforward update from v1.10.2.

• Updated dependencies
  • nerves_system_br v1.11.0
  • linux 4.19.97 (raspberrypi-kernel_1.20200212-1 tag)
  • Erlang 22.2.8