[release] Set release & tag: 1.4.0

Author: git

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.sinch.sdk</groupId>
     <artifactId>sinch-sdk-java</artifactId>
-    <version>1.4.0-next-SNAPSHOT</version>
+    <version>1.4.0</version>
 
     <name>Sinch Java SDK</name>
     <description>
@@ -37,7 +37,7 @@
         <url>https://github.com/sinch/sinch-sdk-java.git</url>
         <connection>scm:git:${project.scm.url}</connection>
         <developerConnection>scm:git:${project.scm.url}</developerConnection>
-      <tag>HEAD</tag>
+      <tag>v1.4.0</tag>
   </scm>
 
     <issueManagement>