Upgrade to mybatis-velocity 2.1.0 GA

Fixes gh-341

Author: kazuki43zoo

pom.xml

@@ -70,7 +70,7 @@
     <mybatis.version>3.5.2</mybatis.version>
     <mybatis-spring.version>2.0.2</mybatis-spring.version>
     <mybatis-freemarker.version>1.2.0-SNAPSHOT</mybatis-freemarker.version>
-    <mybatis-velocity.version>2.1.0-SNAPSHOT</mybatis-velocity.version>
+    <mybatis-velocity.version>2.1.0</mybatis-velocity.version>
     <mybatis-thymeleaf.version>1.0.0</mybatis-thymeleaf.version>
     <spring-boot.version>2.1.6.RELEASE</spring-boot.version>
   </properties>