Merge pull request #599 from mybatis/dependabot/maven/spring.version-…

…5.3.9

Bump spring.version from 5.3.8 to 5.3.9

pom.xml

@@ -106,7 +106,7 @@
     <osgi.dynamicImport>*</osgi.dynamicImport>
 
     <mybatis.version>3.5.7</mybatis.version>
-    <spring.version>5.3.8</spring.version>
+    <spring.version>5.3.9</spring.version>
     <spring-batch.version>4.3.3</spring-batch.version>
     <module.name>org.mybatis.spring</module.name>