Bumps version to 1.3.1.

Author: tgregg

README.md

@@ -60,7 +60,7 @@ dependency into your project's `pom.xml`:
 <dependency>
   <groupId>software.amazon.ion</groupId>
   <artifactId>ion-java</artifactId>
-  <version>1.3.0</version>
+  <version>1.3.1</version>
 </dependency>
 ```
 

pom.xml

@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>software.amazon.ion</groupId>
   <artifactId>ion-java</artifactId>
-  <version>1.3.1-SNAPSHOT</version>
+  <version>1.3.1</version>
   <packaging>bundle</packaging>
 
   <name>${project.groupId}:${project.artifactId}</name>