Polish contribution

As of `1.2.0` MyBatis is using the new `ObjectProvider` facility in
Spring Framework 4.3. This one was made available as of `1.4.0.M2`

Closes gh-335

initializr-service/src/main/resources/application.yml

@@ -279,10 +279,10 @@ initializr:
           groupId: org.mybatis.spring.boot
           artifactId: mybatis-spring-boot-starter
           mappings:
-            - versionRange: 1.4.0.M2
-              version: 1.2.0
             - versionRange: "[1.3.0.RELEASE,1.4.0.M2)"
               version: 1.1.1
+            - versionRange: 1.4.0.M2
+              version: 1.2.0
         - name: JDBC
           id: jdbc
           description: JDBC databases