maint: require amici<1.0.0

[dweindl]

Soonishly, there will be amici 1.0.0, which will break some things here. Require <1.0.0 until everything is updated (-> #1619).

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.58%. Comparing base (e2caf55) to head (be73d9c).
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Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1618      +/-   ##
===========================================
- Coverage    83.61%   83.58%   -0.03%     
===========================================
  Files          163      163              
  Lines        14018    14018              
===========================================
- Hits         11721    11717       -4     
- Misses        2297     2301       +4     

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