Upgrade oxerr-parent from 2.1.0 to 2.2.1.

Author: sutra

pom.xml

@@ -9,7 +9,7 @@
     <parent>
         <groupId>org.oxerr</groupId>
         <artifactId>oxerr-parent</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.1</version>
     </parent>
     <groupId>us.codecraft</groupId>
     <version>1.0.0-SNAPSHOT</version>