Add optional javax.money dependency

Add an optional dependency to `javax.money` to Eclipse errors in
`WebConversionService`.

See gh-5523
See gh-11402

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

@@ -121,6 +121,11 @@
 			<artifactId>javax.json.bind-api</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>javax.money</groupId>
+			<artifactId>money-api</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>io.searchbox</groupId>
 			<artifactId>jest</artifactId>