Upgrade to Spring Boot 2.7 M3.

Switch from UUID to String as identifier type in LineItems as Hibernate doesn't like that on recent H2 versions.

Author: odrotbohm

server/pom.xml

@@ -12,7 +12,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.7.0-M1</version>
+		<version>2.7.0-M3</version>
 	</parent>
 
 	<properties>

server/src/main/java/org/springsource/restbucks/order/LineItem.java

@@ -49,7 +49,7 @@ public class LineItem implements Entity<Order, LineItemIdentifier> {
 
 	public LineItem(Drink drink) {
 
-		this.id = LineItemIdentifier.of(UUID.randomUUID());
+		this.id = LineItemIdentifier.of(UUID.randomUUID().toString());
 		this.name = drink.getName();
 		this.quantity = 1;
 		this.milk = drink.getMilk();
@@ -69,6 +69,6 @@ LineItem increaseAmount() {
 
 	@Value(staticConstructor = "of")
 	public static class LineItemIdentifier implements Identifier {
-		UUID id;
+		String id;
 	}
 }