Fix backport branch CI

[codecov[bot]]

Codecov Report

Patch coverage: 50.00% and project coverage change: +0.11% :tada:

Comparison is base (b1beea8) 70.60% compared to head (dc10295) 70.72%. Report is 2 commits behind head on backport_0.8.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## backport_0.8 #581 +/- ## ================================================ + Coverage 70.60% 70.72% +0.11% ================================================ Files 81 81 Lines 8584 8584 ================================================ + Hits 6061 6071 +10 + Misses 2523 2513 -10 ``` | [Files Changed](https://app.codecov.io/gh/JuliaApproximation/ApproxFunBase.jl/pull/581?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation) | Coverage Δ | | |---|---|---| | [src/Domain.jl](https://app.codecov.io/gh/JuliaApproximation/ApproxFunBase.jl/pull/581?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL0RvbWFpbi5qbA==) | `67.14% <ø> (ø)` | | | [src/specialfunctions.jl](https://app.codecov.io/gh/JuliaApproximation/ApproxFunBase.jl/pull/581?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL3NwZWNpYWxmdW5jdGlvbnMuamw=) | `69.07% <33.33%> (ø)` | | | [src/show.jl](https://app.codecov.io/gh/JuliaApproximation/ApproxFunBase.jl/pull/581?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL3Nob3cuamw=) | `95.37% <100.00%> (ø)` | | ... and [4 files with indirect coverage changes](https://app.codecov.io/gh/JuliaApproximation/ApproxFunBase.jl/pull/581/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation)

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