bump patch version to 0.4.15 (#271)

Author: rafaqz

Project.toml

@@ -1,7 +1,7 @@
 name = "DiskArrays"
 uuid = "3c3547ce-8d99-4f5e-a174-61eb10b00ae3"
 authors = ["Fabian Gans <fgans@bgc-jena.mpg.de>"]
-version = "0.4.14"
+version = "0.4.15"
 
 [deps]
 ConstructionBase = "187b0558-2788-49d3-abe0-74a17ed4e7c9"