CompatHelper: bump compat for "CEnum" to "0.4"

Author: github-actions[bot]

Project.toml

@@ -10,7 +10,7 @@ GeoInterface = "cf35fbd7-0cd7-5166-be24-54bfbe79505f"
 Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
 [compat]
-CEnum = "0.2, 0.3"
+CEnum = "0.2, 0.3, 0.4"
 GEOS_jll = "3.8"
 GeoInterface = "0.4, 0.5"
 julia = "1.3"