Merge pull request #43 from iss2g/update-dsp-compat

Update DSP compat

Author: peterkovesi

Project.toml

@@ -22,7 +22,7 @@ PyPlot = "d330b81b-6aea-500a-939a-2ce795aea3ee"
 ImageProjectiveGeometryPyPlotExt = "PyPlot"
 
 [compat]
-DSP = "0.5 - 0.7"
+DSP = "0.5 - 0.8"
 FileIO = "1"
 ImageFiltering = "0.4 - 0.7"
 Images = "0.20 - 0.25"