version bump

Author: ziyanli-amazon

README.md

@@ -24,7 +24,7 @@ You can download release builds through the [releases section of this](https://g
   <dependency>
     <groupId>software.amazon.payloadoffloading</groupId>
     <artifactId>payloadoffloading-common</artifactId>
-    <version>2.1.3</version>
+    <version>2.2.0</version>
   </dependency>
 ```   
 

pom.xml

@@ -158,7 +158,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.6</version>
+                        <version>3.1.0</version>
                         <executions>
                             <execution>
                                 <id>sign-artifacts</id>