Include Junit5 dependencies in Spring Boot Starter Test

Closes gh-14736

Co-authored-by: Stephane Nicoll <snicoll@pivotal.io>

spring-boot-project/spring-boot-starters/spring-boot-starter-test/pom.xml

@@ -36,8 +36,16 @@
 			<artifactId>jakarta.xml.bind-api</artifactId>
 		</dependency>
 		<dependency>
-			<groupId>junit</groupId>
+			<groupId>org.junit.jupiter</groupId>
-			<artifactId>junit</artifactId>
+			<artifactId>junit-jupiter</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.vintage</groupId>
+			<artifactId>junit-vintage-engine</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-junit-jupiter</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.assertj</groupId>