CompatHelper: bump compat for Interpolations to 0.15, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -17,7 +17,7 @@ CachedArrays = "0.1.2"
 CoordinateTransformations = "0.5, 0.6"
 ImageTransformations = "0.8, 0.9"
 Images = "0.23, 0.24, 0.25, 0.26"
-Interpolations = "0.12, 0.13"
+Interpolations = "0.12, 0.13, 0.15"
 Unitful = "1"
 julia = "1.1"