Htag

feat: tag.state.save() called before render guess

**Full Changelog**: https://github.com/manatlan/htag/compare/v0.41.0...v0.42.0

and new methods in session file&memory (contains, len, delitem, ...)

**Full Changelog**: https://github.com/manatlan/htagweb/compare/v0.9.2...v0.9.3

minor release

- tag.state is now a real attr setted when main tag start in hrenderer
- more methods on tag.state (contains, len, load/export, clear, delitem ...)
- when tag.state is rempty -> remove eveything in real session

**Full Changelog**: https://github.com/manatlan/htag/compare/v0.40.0...v0.41.0

Another BIG CHANGE (the last, on core side ;-) )

A tag instance got two dict-likes (or none) :

- `session`: is the previous "state" ... and contains the real session of the hrenderer
- `state` : is now the state of the root object (which is, just, a subdict-like of the session). To isolate the state of the current main/root tag.

It's more consistent, and it's mainly for the web. Because on desktop/mobile ; the tag instance is never recreated : it lives during as long as the app lives (so state & session will live the the same)

There will be several minors releases, to populate more useful methods in "TagState".

**Full Changelog**: https://github.com/manatlan/htag/compare/v0.30.0...v0.40.0

Fix the serverredys.stop() (TypeError: stop() missing 1 required positional argument: 's')

add redys instance if available ;-)