Upgrade to mybatis 3.5.1

Fixes gh-47

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.
@@ -83,7 +83,7 @@
     <dependency>
       <groupId>org.mybatis</groupId>
       <artifactId>mybatis</artifactId>
-      <version>3.4.6</version>
+      <version>3.5.1</version>
     </dependency>
     <dependency>
       <groupId>org.freemarker</groupId>