Bump to version 2.4.0

Author: Jochen Schalanda

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>org.graylog.plugins</groupId>
     <artifactId>graylog-plugin-slack</artifactId>
-    <version>2.3.0</version>
+    <version>2.4.0</version>
     <packaging>jar</packaging>
 
     <name>${project.artifactId}</name>

src/main/java/org/graylog2/plugins/slack/SlackPluginMetadata.java

@@ -32,7 +32,7 @@ public URI getURL() {
 
     @Override
     public Version getVersion() {
-        return new Version(2, 3, 0);
+        return new Version(2, 4, 0);
     }
 
     @Override