Mangum

* Add support for [Lifespan State](https://asgi.readthedocs.io/en/latest/specs/lifespan.html#lifespan-state).

No changes were made compared to 0.18.0a1.

* Support Python 3.13 by Kludex in https://github.com/Kludex/mangum/pull/327

* Remove 3.6 reference from frameworks docs by aminalaee in https://github.com/jordaneremieff/mangum/pull/278
* Add new blog post to external links by aminalaee in https://github.com/jordaneremieff/mangum/pull/279
* Add exclude_headers parameter by aminalaee in https://github.com/jordaneremieff/mangum/pull/280

* Link to deployment tutorial by simonw in https://github.com/jordaneremieff/mangum/pull/274
* Added text_mime_types argument by georgebv in https://github.com/jordaneremieff/mangum/pull/277

* Mention that Django works fine too by WhyNotHugo in https://github.com/jordaneremieff/mangum/pull/261
* Add vnd.oai.openapi to mime type list that are not base64 encoded by khamaileon in https://github.com/jordaneremieff/mangum/pull/271