v0.11.1

• Add ClientBuilder::tls_built_in_root_certs() option to disable built-in root certificates.
• Fix rustls-tls glue to more often support ALPN to upgrade to HTTP/2.
• Fix proxy parsing to assume http:// if no scheme is found.
• Fix connection pool idle reaping by enabling hyper's runtime feature.
• (wasm) Add Request::new() constructor.