v0.1.8

Security

• HTTP/2 layer updated to a patched release. h2 moves from 0.4.15 to
  0.4.19, closing a denial of service through unbounded empty DATA frames
  (RUSTSEC-2026-0258).
• Error library updated to a patched release. anyhow moves from 1.0.102
  to 1.0.104, closing an unsoundness in Error::downcast_mut()
  (RUSTSEC-2026-0190).
• TLS library updated to a patched release. The pinned rustls carried
  RUSTSEC-2026-0285 (medium). Every outbound HTTPS connection goes through it.