[skip ci] [maven] prepare for next development iteration

pom.xml

@@ -10,7 +10,7 @@
 
     <groupId>io.websight</groupId>
     <artifactId>io.websight.sling.bundleresource.impl</artifactId>
-    <version>2.1.8</version>
+    <version>2.1.9-SNAPSHOT</version>
 
     <name>WebSight.io fork of Apache Sling Bundle Resource Provider</name>
     <description>
@@ -29,7 +29,7 @@
         <connection>scm:git:git://github.com/websight-io/websight-bundle-resource-provider.git</connection>
         <developerConnection>scm:git:[email protected]:websight-io/websight-bundle-resource-provider.git</developerConnection>
         <url>https://github.com/websight-io/websight-bundle-resource-provider</url>
-        <tag>v2.1.8</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <distributionManagement>