Update FillArrays requirement from 0.13 to 0.13, 1.15 (#31)

Updates the requirements on [FillArrays](https://github.com/JuliaArrays/FillArrays.jl) to permit the latest version.
- [Release notes](https://github.com/JuliaArrays/FillArrays.jl/releases)
- [Commits](JuliaArrays/FillArrays.jl@v0.13.0...v1.15.0)

---
updated-dependencies:
- dependency-name: FillArrays
  dependency-version: 1.15.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Project.toml

@@ -16,7 +16,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 [compat]
 Aqua = "0.6"
 Documenter = "0.27"
-FillArrays = "0.13"
+FillArrays = "0.13, 1.15"
 Graphs = "1.7"
 HiGHS = "1"
 JuMP = "1"