v1.18.2

This is a Buildroot and Erlang bug fix release. It should be a low risk upgrade
from the previous release.

• Updated dependencies

  • nerves_system_br v1.18.4

• Changes

  • Specify CPU-specific flags when compiling NIFs and ports. This fixes an
    issue where some optimizations could not be enabled in NIFs even though it
    should be possible to have them. E.g., ARM NEON support for CPUs that have
    it.
  • Build the Wireguard kernel driver. This is a small device driver that
    enables a number of VPN-based use cases.