v1.3.0

This release upgrades gcc from version 6.3.0 to 7.3.0. See the toolchain release
notes for more information.

• Bug fixes

  • Disable ldattach and build package dumb_ldattach.
    This fixes an issue with that prevents the UART sensor from functioning.

• Updated dependencies

  • nerves_system_br v1.4.1
  • nerves_toolchain_armv5tejl_unknown_linux_musleabi v1.1.0