Merge remote-tracking branch 'origin/compathelper/new_version/2019-12-18-19-04-20-067-204644810' into pr2-0.5.5

Author: mfalt

Project.toml

@@ -20,7 +20,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-Colors = "0.9.2"
+Colors = "0.9.2, 0.11"
 DSP = "0.6.1"
 DelayDiffEq = "5.6"
 IterTools = "1.0"