Changed version to 6.2.0

Added toolchain.

Minor fix to "java11plus" profile.

Author: leerho

pom.xml

@@ -33,7 +33,7 @@ under the License.
 
   <groupId>org.apache.datasketches</groupId>
   <artifactId>datasketches-java</artifactId>
-  <version>6.2.0-SNAPSHOT</version>
+  <version>6.2.0</version>
   <packaging>jar</packaging>
 
   <name>${project.artifactId}</name>
@@ -117,6 +117,7 @@ under the License.
     <maven-remote-resources-plugin.version>3.2.0</maven-remote-resources-plugin.version>
     <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
     <maven-surefire-failsafe-plugins.version>3.4.0</maven-surefire-failsafe-plugins.version> <!-- for surefire, failsafe and surefire-report-->
+    <maven-toolchains-plugin.version>3.2.0</maven-toolchains-plugin.version>
     <!-- com.github plugins -->
     <git-commit-id-plugin.version>4.9.10</git-commit-id-plugin.version>    
     <!-- org.apache.creadur plugins -->
@@ -287,6 +288,26 @@ under the License.
           </configuration>
         </plugin>
 
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-toolchains-plugin</artifactId>
+          <version>${maven-toolchains-plugin.version}</version>
+          <executions>
+            <execution>
+              <goals>
+                <goal>toolchain</goal>
+              </goals>
+            </execution>
+          </executions>
+          <configuration>
+            <toolchains>
+              <jdk>
+                <version>${java.version}</version>
+              </jdk>
+            </toolchains>
+          </configuration>
+        </plugin>
+
         <plugin>
           <!-- Apache Parent pom, pluginManagement-->
           <groupId>org.apache.rat</groupId>
@@ -627,10 +648,10 @@ under the License.
     <profile>
       <id>java11plus</id>
       <activation>
-        <jdk>[11,14)</jdk>
+        <jdk>[11,12)</jdk>
       </activation>
       <properties>
-        <maven.compiler.release>8</maven.compiler.release>
+        <maven.compiler.release>11</maven.compiler.release>
       </properties>
       <build>
         <pluginManagement>