Bump version number.

Author: simonbrowndotje

build.gradle

@@ -8,7 +8,7 @@ subprojects { proj ->
 
     description = 'Structurizr'
     group = 'com.structurizr'
-    version = '1.15.2'
+    version = '1.15.3'
 
     repositories {
         mavenCentral()