CompatHelper: bump compat for "IntervalSets" to "0.6" (#91)

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

Author: github-actions[bot]

Project.toml

@@ -19,7 +19,7 @@ Compat = "2, 3"
 DSP = "0.6.1, 0.7"
 FFTW = "1.1.0"
 FixedPointNumbers = "0.6.1, 0.7, 0.8"
-IntervalSets = "0.3.2, 0.4, 0.5"
+IntervalSets = "0.3.2, 0.4, 0.5, 0.6"
 TreeViews = "0.3"
 Unitful = "0.17.0, 0.18, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7"
 julia = "1"