curl: macOS and TLS 1.3

On macOS we configure curl to use Secure Transport as the TLS backend. According to curl issue 4524, the Secure Transport backend does not support TLS 1.3. curl PR 12900 added a warning about using any backend that does not support TLS 1.3. If curl removes support for the Secure Transport backend, we'll need another way to support macOS and its native certificate store.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information