This implies some notable changes that will have a visible impact to
end-users of official Terraform releases:

- Terraform is no longer compatible with MacOS 10.10 Yosemite, and
  requires at least 10.11 El Capitan. (Relatedly, Go 1.14 is planned to be
  the last release to support El Capitan, so while that remains supported
  for now, it's notable that Terraform 0.13 is likely to be the last major
  release of Terraform supporting it, with 0.14 likely to further require
  MacOS 10.12 Sierra.)

- Terraform is no longer compatible with FreeBSD 10.x, which has reached
  end-of-life. Terraform now requires FreeBSD 11.2 or later.

- Terraform now supports TLS 1.3 when it makes connections to remote
  services such as backends and module registries. Although TLS 1.3 is
  backward-compatible in principle, some legacy systems reportedly work
  incorrectly when attempting to negotiate it. (This change does not
  affect outgoing requests made by provider plugins, though they will see
  a simila...