Support curl's `--tls-max` option

[josh-coderpad]

Problem to solve

Assert that insecure versions of TLS are disabled

Proposal

Support curl's --tls-max option in [Options], and provide a way to check that the request failed. Here's how to do it with curl: curl -o /dev/null -sw %{http_code} --tls-max 1.0 https://example.com (outputs 000 if TLS 1.0 is disabled).

Additional context and resources

Seems similar to #166