Update compat for IntervalSets (#79)

Author: rob-luke

Project.toml

@@ -19,7 +19,7 @@ Compat = "2, 3"
 DSP = "0.6.1"
 FFTW = "1.1.0"
 FixedPointNumbers = "0.6.1, 0.7, 0.8"
-IntervalSets = "0.3.2"
+IntervalSets = "0.3.2, 0.4, 0.5"
 TreeViews = "0.3"
 Unitful = "0.17.0"
 julia = "1"