Upgrade to Jackson 2.9.0

Closes gh-9912

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration.java

@@ -114,7 +114,7 @@ public class JacksonAutoConfiguration {
 			JacksonJodaDateFormat jacksonJodaFormat = getJacksonJodaDateFormat();
 			if (jacksonJodaFormat != null) {
 				module.addSerializer(DateTime.class,
-						new DateTimeSerializer(jacksonJodaFormat));
+						new DateTimeSerializer(jacksonJodaFormat, 0));
 			}
 			return module;
 		}

spring-boot-dependencies/pom.xml

@@ -94,7 +94,7 @@
 		<httpcore.version>4.4.6</httpcore.version>
 		<infinispan.version>9.1.0.Final</infinispan.version>
 		<influxdb-java.version>2.7</influxdb-java.version>
-		<jackson.version>2.9.0.pr4</jackson.version>
+		<jackson.version>2.9.0</jackson.version>
 		<janino.version>3.0.7</janino.version>
 		<javassist.version>3.21.0-GA</javassist.version> <!-- Same as Hibernate -->
 		<javax-cache.version>1.0.0</javax-cache.version>