[maven-release-plugin] prepare release sketches-core-0.7.0

pom.xml

@@ -8,7 +8,7 @@
   <groupId>com.yahoo.datasketches</groupId>
   <artifactId>sketches-core</artifactId>
   <packaging>jar</packaging>
-  <version>0.6.1-SNAPSHOT</version>
+  <version>0.7.0</version>
 
   <!-- Project Information -->
   <name>${project.groupId}:${project.artifactId}</name>
@@ -106,7 +106,7 @@
     <connection>scm:git:ssh://[email protected]/DataSketches/sketches-core.git</connection>
     <developerConnection>scm:git:ssh://[email protected]/DataSketches/sketches-core.git</developerConnection>
     <url>https://github.com/DataSketches/sketches-core.git</url>
-    <tag>HEAD</tag>
+    <tag>sketches-core-0.7.0</tag>
   </scm>
 
   <prerequisites>