Add spring-boot-devtools dependency

Author: teetangh

pom.xml

@@ -46,6 +46,12 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
 
         <dependency>
             <groupId>io.springfox</groupId>