packaging: set cars-filter version to 0.1.*

setup.cfg

@@ -81,7 +81,7 @@ install_requires =
     libsgm==0.4.6
     cars-rasterize==0.2.*
     cars-resample==0.1.*
-    cars-filter
+    cars-filter==0.1.*
     vlsift==0.1.*
     shareloc==0.2.3
     bulldozer-dtm