Upgrade to Spring Boot 1.5.19.RELEASE

Fixes gh-293

Author: kazuki43zoo

pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-       Copyright 2015-2018 the original author or authors.
+       Copyright 2015-2019 the original author or authors.
 
        Licensed under the Apache License, Version 2.0 (the "License");
        you may not use this file except in compliance with the License.
@@ -69,7 +69,7 @@
   <properties>
     <mybatis.version>3.4.6</mybatis.version>
     <mybatis-spring.version>1.3.2</mybatis-spring.version>
-    <spring-boot.version>1.5.17.RELEASE</spring-boot.version>
+    <spring-boot.version>1.5.19.RELEASE</spring-boot.version>
   </properties>
 
   <dependencyManagement>