Update DomainSets requirement from 0.5, 0.6, 0.7 to 0.5, 0.6, 0.7, 0.8

Updates the requirements on [DomainSets](https://github.com/JuliaApproximation/DomainSets.jl) to permit the latest version.
- [Release notes](https://github.com/JuliaApproximation/DomainSets.jl/releases)
- [Commits](https://github.com/JuliaApproximation/DomainSets.jl/commits/v0.8.0)

---
updated-dependencies:
- dependency-name: DomainSets
  dependency-version: 0.8.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Project.toml

@@ -35,7 +35,7 @@ Aqua = "0.8"
 BandedMatrices = "0.16, 0.17, 1"
 BlockArrays = "0.14, 0.15, 0.16, 1"
 BlockBandedMatrices = "0.10, 0.11, 0.12, 0.13"
-DomainSets = "0.5, 0.6, 0.7"
+DomainSets = "0.5, 0.6, 0.7, 0.8"
 DualNumbers = "0.6.2"
 FastGaussQuadrature = "0.4, 0.5, 1"
 FastTransforms = "0.12, 0.13, 0.14, 0.15.1, 0.16, 0.17"