SpringBoot 2.1.1.RELEASE集成devtools

SpringBoot 2.1.1.RELEASE集成devtools http://www.qchcloud.cn/system/article/show/74 引入依赖：

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
            <scope>true</scope>
            <version>2.0.4.RELEASE</version>
        </dependency>