Llhttp

Major API changes:

- 015e155 - api: `LENIENT_CHUNKED_LENGTH`
- 4cc13c0 - http: add additional completion callbacks

Changelog:

- 0b0772c - constants: add RTSP/RAOP methods
- dd7f9fe - api: add a comment about `settings` lifetime

What's Changed
* Strict transfer encoding 2.1 by mcollina in https://github.com/nodejs/llhttp/pull/162


**Full Changelog**: https://github.com/nodejs/llhttp/compare/v2.1.4...v2.1.5

What's Changed
* v2.1.3 fix by mcollina in https://github.com/nodejs/llhttp/pull/132


**Full Changelog**: https://github.com/nodejs/llhttp/compare/v2.1.3...v2.1.4

Changelog:

- 883d9dd - http: 0xFF is a valid character in header value

Changelog:

- 9d9da1d - http: use safe `toLower()` for selected nodes