specify ImageCore compat

Author: Max Freudenberg

Project.toml

@@ -45,6 +45,7 @@ Flatten = "0.4"
 GeoFormatTypes = "0.4"
 GeoInterface = "1"
 HDF5 = "0.14, 0.15, 0.16"
+ImageCore = "<1.0"
 Missings = "0.4, 1"
 NCDatasets = "0.10, 0.11, 0.12"
 PolygonInbounds = "0.2.0"