Restrict StartUpDG.jl to 0.17.6

[jlchan]

StartUpDG v0.17.7 fixes the type piracy issue #1639, but now there are duplicate definitions of RefElemData for SummationByPartsOperators.AbstractDerivativeOperator.

This will restrict the version to the previous one until a PR is made to remove the type piracy

[github-actions]

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[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (67ddfbb) 85.12% compared to head (1bfc8e9) 92.96%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1663      +/-   ##
==========================================
+ Coverage   85.12%   92.96%   +7.83%     
==========================================
  Files         418      419       +1     
  Lines       34229    34268      +39     
==========================================
+ Hits        29137    31854    +2717     
+ Misses       5092     2414    -2678     

Flag	Coverage Δ
unittests	92.96% <ø> (+7.83%)	⬆️

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see 90 files with indirect coverage changes

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[ranocha]

Another problem is that older versions of Trixi.jl still allow the recent version of StartUpDG.jl. Could you maybe instead just make a PR with the required update for Trixi.jl and set the minimum version of StartUpDG.jl to v0.17.7?

[jlchan]

Another problem is that older versions of Trixi.jl still allow the recent version of StartUpDG.jl. Could you maybe instead just make a PR with the required update for Trixi.jl and set the minimum version of StartUpDG.jl to v0.17.7?

Sure, no problem - I'll add that today. This PR was just intended as a temporary fix in the meantime, so when I submit that new PR we would be able to close this one.

[jlchan]

Closing in favor of #1665