chore: Upgrade to Winnow 0.7

[epage]

With 0.7, ErrMode is optional. It looks like cut_err isn't used but I held off on migrating from ModalResult to winnow::Result and ModalParser to Parser in case there is a future possibility of using ErrMode.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.06%. Comparing base (5329ab9) to head (5b9f170).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2109   +/-   ##
=======================================
  Coverage   80.05%   80.06%           
=======================================
  Files         102      102           
  Lines       24117    24121    +4     
=======================================
+ Hits        19308    19313    +5     
+ Misses       4809     4808    -1     

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[sunshowers]

Thanks! Yeah, I think preserving the ability to do backtracks and cuts is useful.

(btw a small bit of doc feedback, https://docs.rs/winnow/latest/winnow/error/enum.ErrMode.html could make it a little clearer that "modal parsing" means, specifically, that more than one kind of error can happen during parsing. Had to read https://docs.rs/winnow/latest/winnow/_tutorial/chapter_7/index.html#error-cuts to understand that.)

[epage]

Docs PR is up at winnow-rs/winnow#733. If you could let me know if that does a sufficient job clarifying things, that'd be great!