Bump Julia compat to 1.10

[gdalle]

• Bump Julia compat in Project.toml from 1.6 to 1.10
• Bump Manifolds version to v0.10.8
• Update CI to run on lts, 1 (stable) and pre (pre-release)
• Remove Requires and its extension shenanigans

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.36%. Comparing base (5bc3cd5) to head (b4394a9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #772      +/-   ##
==========================================
- Coverage   96.41%   96.36%   -0.06%     
==========================================
  Files         124      124              
  Lines       11590    11582       -8     
==========================================
- Hits        11175    11161      -14     
- Misses        415      421       +6     

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[mateuszbaran]

LGTM 👍 . I guess we could merge this and #770 and tag 0.10.8? Or is this PR not finished yet?

[gdalle]

Do you mean #771? If so, that PR is not ready yet, you first need to tag the breaking release v0.4.0 of ManifoldDiff

[mateuszbaran]

Ah, sorry, I meant #772

[mateuszbaran]

And #770, because it's also ready and could be a part of single 0.10.8 release. #771 will be left for later.

[mateuszbaran]

I was a bit confused with the discussions split among multiple PRs 😄