Upgrade to Reactor Bom Californium-SR18

Clsoes gh-20937

Author: snicoll

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

@@ -151,7 +151,7 @@
 		<quartz.version>2.3.2</quartz.version>
 		<querydsl.version>4.2.2</querydsl.version>
 		<rabbit-amqp-client.version>5.4.3</rabbit-amqp-client.version>
-		<reactor-bom.version>Californium-BUILD-SNAPSHOT</reactor-bom.version>
+		<reactor-bom.version>Californium-SR18</reactor-bom.version>
 		<rest-assured.version>3.1.1</rest-assured.version>
 		<reactive-streams.version>1.0.3</reactive-streams.version>
 		<rxjava.version>1.3.8</rxjava.version>