Merge pull request #225 from mybatis/renovate/mybatis.version

Update dependency org.mybatis:mybatis to v3.5.15

pom.xml

@@ -67,7 +67,7 @@
 
   <properties>
     <!-- Dependencies artifact version -->
-    <mybatis.version>3.5.14</mybatis.version>
+    <mybatis.version>3.5.15</mybatis.version>
     <thymeleaf.version>3.1.2.RELEASE</thymeleaf.version>
 
     <!-- Dependencies plugin version -->