CompatHelper: bump compat for "IntervalSets" to "0.6" (#93)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

Project.toml

@@ -41,7 +41,7 @@ FastGaussQuadrature = "0.4"
 FillArrays = "0.11, 0.12, 0.13"
 InfiniteArrays = "0.11, 0.12"
 InfiniteLinearAlgebra = "0.5, 0.6"
-IntervalSets = "0.5"
+IntervalSets = "0.5, 0.6"
 LazyArrays = "0.20, 0.21, 0.22"
 LowRankApprox = "0.2, 0.3, 0.4, 0.5"
 SpecialFunctions = "0.10, 1.0, 2"