release #533 Upgrade to 2.1.5.

Author: toastkidjp

buildSrc/src/main/java/property/Version.kt

@@ -3,7 +3,7 @@ package property
 object Version {
     private const val MAJOR  = 2
     private const val MIDDLE = 1
-    private const val MINOR  = 4
+    private const val MINOR  = 5
 
     init {
         if (MIDDLE >= 100 || MINOR >= 10_000) {