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

Author: res0nance

pom.xml

@@ -9,7 +9,7 @@
     <artifactId>validating-string-parameter</artifactId>
     <packaging>hpi</packaging>
     <name>Validating String Parameter Plugin</name>
-    <version>2.7</version>
+    <version>2.8-SNAPSHOT</version>
     <url>https://github.com/jenkinsci/validating-string-parameter-plugin</url>
 
     <properties>
@@ -22,7 +22,7 @@
         <developerConnection>scm:git:git@github.com:jenkinsci/validating-string-parameter-plugin.git
         </developerConnection>
         <url>https://github.com/jenkinsci/validating-string-parameter-plugin</url>
-        <tag>validating-string-parameter-2.7</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <repositories>