Upgrade to Boot 2.4.2

Keeping the build files current and adding deep links to the Intializr.

.travis.yml

 sudo: false
 language: java
 jdk:
-- openjdk8
+- openjdk11
 script:
 - test/run.sh
 notifications:

README.adoc

-:spring_boot_version: 2.3.3.RELEASE
+:spring_boot_version: 2.4.2
 :spring-boot: https://github.com/spring-projects/spring-boot
 :toc:
 :icons: font
@@ -59,6 +59,7 @@ Initializr]. The Initializr offers a fast way to pull in all the dependencies yo
 an application and does a lot of the setup for you. This example needs only the Spring Web
 dependency.
 
+You can get a Maven build file with the necessary dependencies directly from the https://start.spring.io/#!type=maven-project&language=java&platformVersion=2.4.2.RELEASE&packaging=jar&jvmVersion=11&groupId=com.example&artifactId=spring-boot&name=spring-boot&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.spring-boot&dependencies=web[Spring Initializr].
 The following listing shows the `pom.xml` file that is created when you choose Maven:
 
 ====
@@ -68,6 +69,7 @@ include::initial/pom.xml[]
 ----
 ====
 
+You can get a Gradle build file with the necessary dependencies directly from the https://start.spring.io/#!type=gradle-project&language=java&platformVersion=2.4.2.RELEASE&packaging=jar&jvmVersion=11&groupId=com.example&artifactId=spring-boot&name=spring-boot&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.spring-boot&dependencies=web[Spring Initializr].
 The following listing shows the `build.gradle` file that is created when you choose Gradle:
 
 ====

complete/build.gradle

 plugins {
-	id 'org.springframework.boot' version '2.3.3.RELEASE'
-	id 'io.spring.dependency-management' version '1.0.8.RELEASE'
+	id 'org.springframework.boot' version '2.4.2'
+	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
 	id 'java'
 }
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '1.8'
+sourceCompatibility = '11'
 
 repositories {
 	mavenCentral()
@@ -18,9 +18,7 @@ dependencies {
 	// end::actuator[]
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	// tag::tests[]
-	testImplementation('org.springframework.boot:spring-boot-starter-test') {
-		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
-	}
+	testImplementation('org.springframework.boot:spring-boot-starter-test')
 	// end::tests[]
 }
 

complete/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.3.RELEASE</version>
+		<version>2.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -15,7 +15,7 @@
 	<description>Demo project for Spring Boot</description>
 
 	<properties>
-		<java.version>1.8</java.version>
+		<java.version>11</java.version>
 	</properties>
 
 	<dependencies>
@@ -36,12 +36,6 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>org.junit.vintage</groupId>
-					<artifactId>junit-vintage-engine</artifactId>
-				</exclusion>
-			</exclusions>
 		</dependency>
 		<!-- end::tests[] -->
 	</dependencies>

initial/build.gradle

 plugins {
-	id 'org.springframework.boot' version '2.3.3.RELEASE'
-	id 'io.spring.dependency-management' version '1.0.8.RELEASE'
+	id 'org.springframework.boot' version '2.4.2'
+	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
 	id 'java'
 }
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '1.8'
+sourceCompatibility = '11'
 
 repositories {
 	mavenCentral()
@@ -14,9 +14,7 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
-	testImplementation('org.springframework.boot:spring-boot-starter-test') {
-		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
-	}
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 
 test {

initial/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.3.RELEASE</version>
+		<version>2.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -13,11 +13,9 @@
 	<version>0.0.1-SNAPSHOT</version>
 	<name>spring-boot</name>
 	<description>Demo project for Spring Boot</description>
-
 	<properties>
-		<java.version>1.8</java.version>
+		<java.version>11</java.version>
 	</properties>
-
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -28,12 +26,6 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>org.junit.vintage</groupId>
-					<artifactId>junit-vintage-engine</artifactId>
-				</exclusion>
-			</exclusions>
 		</dependency>
 	</dependencies>