Deprecate unfold for std::iter::from_fn

[Philippe-Cholet]

Solves #223. Based on #610 (comment) that suggested to add a deprecation notice instead of removing it directly.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6814180) 94.38% compared to head (db47289) 94.25%.
Report is 2 commits behind head on master.

❗ Current head db47289 differs from pull request most recent head 777b341. Consider uploading reports for the commit 777b341 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #871      +/-   ##
==========================================
- Coverage   94.38%   94.25%   -0.14%     
==========================================
  Files          48       48              
  Lines        6665     6666       +1     
==========================================
- Hits         6291     6283       -8     
- Misses        374      383       +9     

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[Philippe-Cholet]

"semver checks" first failed in CI, I therefore updated the version to "0.13.0".

[jswrenn]

Thanks! You've been absolutely killing it with triage lately, and the effort is much appreciated!

[Philippe-Cholet]

@jswrenn Yes after some PRs of mine that resolved old issues and closed a few PRs and some (I think reasonable) triage, we finally have less than 100 issues and 30 PRs. 🎉