[maven-release-plugin] prepare release 3.4.0

pom.xml

@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<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">
+<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>de.ahus1.prometheus.hystrix</groupId>
     <artifactId>prometheus-hystrix</artifactId>
-    <version>3.3.2-SNAPSHOT</version>
+    <version>3.4.0</version>
     <name>prometheus-hystrix-metrics-publisher</name>
     <description>This is an implementation of a HystrixMetricsPublisher that publishes metrics using the Prometheus java
         client.
@@ -45,7 +44,7 @@
         <connection>scm:git:[email protected]:ahus1/prometheus-hystrix.git</connection>
         <developerConnection>scm:git:[email protected]:ahus1/prometheus-hystrix.git</developerConnection>
         <url>scm:git:[email protected]:ahus1/prometheus-hystrix.git</url>
-        <tag>HEAD</tag>
+        <tag>3.4.0</tag>
     </scm>
     <dependencies>
         <dependency>