Set groupId to io.github.clojure

Author: puredanger

pom.xml

@@ -1,5 +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>io.github.clojure</groupId>
   <artifactId>tools.build</artifactId>
   <version>0.9.3-SNAPSHOT</version>
   <name>tools.build</name>