Start building against Spring Security 5.1.3 snapshots

See gh-15417

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -59,7 +59,7 @@
 		<ehcache.version>2.10.6</ehcache.version>
 		<ehcache3.version>3.6.2</ehcache3.version>
 		<embedded-mongo.version>2.1.1</embedded-mongo.version>
-		<flyway.version>5.2.4</flyway.version>
+		<flyway.version>5.2.3</flyway.version>
 		<freemarker.version>2.3.28</freemarker.version>
 		<elasticsearch.version>6.4.3</elasticsearch.version>
 		<glassfish-el.version>3.0.0</glassfish-el.version>
@@ -175,7 +175,7 @@
 		<spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>
 		<spring-restdocs.version>2.0.2.RELEASE</spring-restdocs.version>
 		<spring-retry.version>1.2.2.RELEASE</spring-retry.version>
-		<spring-security.version>5.1.2.RELEASE</spring-security.version>
+		<spring-security.version>5.1.3.BUILD-SNAPSHOT</spring-security.version>
 		<spring-session-bom.version>Bean-SR1</spring-session-bom.version>
 		<spring-ws.version>3.0.4.RELEASE</spring-ws.version>
 		<sqlite-jdbc.version>3.25.2</sqlite-jdbc.version>