v1.16.2

This release updates Erlang/OTP from 24.0.3 to 24.0.5 and Buildroot from 2021.05
to 2021.05.1. Both of these are security/bug fix updates. This is expected to be
a safe upgrade from v1.16.1 for all users.

• Updated dependencies

  • nerves_system_br v1.16.4
  • Erlang/OTP 24.0.5

• Improvements

  • Beta support for using a runtime.exs script for runtime configuration.
  • Added a provision task to the fwup.config to enable re-provisioning a
    MicroSD card without changing its contents.
  • Adds a default /etc/sysctl.conf that enables use of ICMP in Erlang. This
    requires nerves_runtime v0.11.5 or later to automatically load the sysctl
    variables. With it using :gen_udp to send/receive ICMP will "just work".
    It also makes it easier to add other sysctl variables if needed.