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

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.lazyparams</groupId>
     <artifactId>lazyparams</artifactId>
-    <version>1.0.0-beta-19</version>
+    <version>1.0.0-beta-20-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>LazyParams</name>
     <url>http://lazyparams.org</url>
@@ -1045,6 +1045,6 @@ reevaluated once-in-while by running tests with this profile enabled!
         <connection>scm:git:https://github.com/kaipe/lazyparams.git</connection>
         <developerConnection>scm:git:https://github.com/kaipe/lazyparams.git</developerConnection>
         <url>https://github.com/kaipe/lazyparams</url>
-      <tag>lazyparams-1.0.0-beta-19</tag>
+      <tag>HEAD</tag>
   </scm>
 </project>