[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -3,7 +3,7 @@
 
   <groupId>com.fossgalaxy.games.tbs</groupId>
   <artifactId>basic-tbs</artifactId>
-  <version>1.2.12</version>
+  <version>1.2.13-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <name>basic-tbs</name>
@@ -25,7 +25,7 @@
     <connection>scm:git:git@git.fossgalaxy.com:ce810/module-game.git</connection>
     <url>scm:git:git@git.fossgalaxy.com:ce810/module-game.git</url>
     <developerConnection>scm:git:git@git.fossgalaxy.com:ce810/module-game.git</developerConnection>
-    <tag>v1.2.12</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <dependencies>