bump version

Author: ianopolous

build.xml

@@ -40,7 +40,7 @@
         <attribute name="Class-Path" value="${manifest_cp}"/>
         <attribute name="Implementation-Vendor" value="io.ipfs"/>
         <attribute name="Implementation-Title" value="multihash"/>
-        <attribute name="Implementation-Version" value="1.2.0"/>
+        <attribute name="Implementation-Version" value="1.3.1"/>
       </manifest>
     </jar>
   </target>

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.github.multiformats</groupId>
     <artifactId>java-multihash</artifactId>
-	<version>v1.3.0-SNAPSHOT</version>
+	<version>v1.3.1</version>
 	<packaging>jar</packaging>
 
 	<name>multihash</name>