Use snapshots

gradle/java.gradle

@@ -2,8 +2,8 @@ apply plugin: 'java'
 apply plugin: 'org.springframework.optional'
 
 ext.apacheDsVersion = '1.5.5'
-ext.springVersion = '4.3.27.RELEASE'
-ext.springDataVersion = '1.13.23.RELEASE'
+ext.springVersion = '6.0.0-SNAPSHOT'
+ext.springDataVersion = '3.0.0-SNAPSHOT'
 ext.springBatchVersion = '2.0.4.RELEASE'
 ext.junitVersion =  '4.12'
 ext.commonsIoVersion = '2.4'
@@ -19,7 +19,7 @@ ext.powerMockVersion = '1.6.5'
 ext.commonsPool2Version = '2.4.2'
 ext.assertjVersion= '2.3.0'
 ext.hibernateVersion = '5.2.5.Final'
-ext.springSecurityVersion='4.2.15.RELEASE'
+ext.springSecurityVersion='6.0.0-SNAPSHOT'
 ext.unboundidVersion = '3.1.1'
 
 ext.powerMockDependencies = [

settings.gradle

@@ -16,6 +16,7 @@ plugins {
 dependencyResolutionManagement {
     repositories {
         mavenCentral()
+        maven { url "https://repo.spring.io/snapshot" }
     }
 }