Set version number for jimfs-parent to 1.3.1.

Author: cpovirk

jimfs/pom.xml

@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.jimfs</groupId>
     <artifactId>jimfs-parent</artifactId>
-    <version>HEAD-SNAPSHOT</version>
+    <version>1.3.1</version>
   </parent>
 
   <artifactId>jimfs</artifactId>

pom.xml

@@ -23,7 +23,7 @@
   <groupId>com.google.jimfs</groupId>
   <artifactId>jimfs-parent</artifactId>
   <packaging>pom</packaging>
-  <version>HEAD-SNAPSHOT</version>
+  <version>1.3.1</version>
 
   <modules>
     <module>jimfs</module>