Change the artifactId to express the project hosting

Closes gh-6.

Author: FagnerMartinsBrack

pom.xml

@@ -1,6 +1,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>org.jscookie</groupId>
+  <groupId>com.github.js-cookie</groupId>
   <artifactId>java-cookie</artifactId>
   <version>0.0.2-SNAPSHOT</version>
   <name>Java Cookie</name>