release: Update version to 0.0.22 for maven release

Signed-off-by: Nick Hill <[email protected]>

Author: njhill

README.md

@@ -143,7 +143,7 @@ KvStoreClient client = EtcdClusterConfig.fromJsonFile(filePath).getClient();
 <dependency>
     <groupId>com.ibm.etcd</groupId>
     <artifactId>etcd-java</artifactId>
-    <version>0.0.21</version>
+    <version>0.0.22</version>
 </dependency>
 
 ```

pom.xml

@@ -18,7 +18,7 @@
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ibm.etcd</groupId>
    <artifactId>etcd-java</artifactId>
-   <version>0.0.22-SNAPSHOT</version>
+   <version>0.0.22</version>
    <packaging>jar</packaging>
 
    <name>etcd-java</name>