[maven-release-plugin] prepare release brackit-0.4

Author: JohannesLichtenberger

pom.xml

@@ -8,7 +8,7 @@
     </parent>
     <groupId>io.sirix</groupId>
     <artifactId>brackit</artifactId>
-    <version>0.4-SNAPSHOT</version>
+    <version>0.4</version>
     <name>Brackit Engine</name>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -26,7 +26,7 @@
         <connection>scm:git:[email protected]:sirixdb/brackit.git</connection>
         <developerConnection>scm:git:[email protected]:sirixdb/brackit.git</developerConnection>
         <url>https://github.com/sirixdb/brackit</url>
-        <tag>brackit-0.1.8</tag>
+        <tag>brackit-0.4</tag>
     </scm>
     <issueManagement>
         <url>https://github.com/sirixdb/brackit/issues</url>
@@ -85,7 +85,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>2.6</version>
+                <version>3.0.0</version>
                 <executions>
                     <execution>
                         <goals>