Bump mybatis from 3.2.7 to 3.5.6

Bumps [mybatis](https://github.com/mybatis/mybatis-3) from 3.2.7 to 3.5.6.
- [Release notes](https://github.com/mybatis/mybatis-3/releases)
- [Commits](https://github.com/mybatis/mybatis-3/compare/mybatis-3.2.7...mybatis-3.5.6)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -18,7 +18,7 @@
 
         <spring.version>5.2.6.RELEASE</spring.version>
         <servlet.version>2.5</servlet.version>
-        <mybatis.version>3.2.7</mybatis.version>
+        <mybatis.version>3.5.6</mybatis.version>
         <mybatis.spring.version>1.1.1</mybatis.spring.version>
         <mybatis.generator.core.version>1.4.0</mybatis.generator.core.version>
         <file_encoding>utf-8</file_encoding>