Bumped javapos-contracts to version 1.15.4.

Author: kuniss

build.gradle

@@ -28,10 +28,10 @@ wrapper {
 def artifactName = 'javapos'
 group='org.javapos'
 def uposVersion = '1.15'
-version="${uposVersion}.4" // the last part after dot is the build/release version
+version="${uposVersion}.5" // the last part after dot is the build/release version
 
 // dependency versions
-def javaposContractsVersion = "$uposVersion.3"
+def javaposContractsVersion = "$uposVersion.4"
 def javaposControlsVersion  = "$uposVersion.0"
 def jclVersion = '4.0.1'