fix version number

Author: Szymon Romik

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.pmem</groupId>
     <artifactId>pmemkv</artifactId>
-    <version>0.8</version>
+    <version>0.8.0</version>
     <name>pmemkv</name>
     <description>Java bindings for pmemkv</description>
     <url>https://github.com/pmem/pmemkv-java</url>