update version to 2.6.2 (#43)

Author: Nicole00

example/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>algorithm</artifactId>
         <groupId>com.vesoft</groupId>
-        <version>2.6.1</version>
+        <version>2.6.2</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -183,7 +183,7 @@
         <dependency>
             <groupId>com.vesoft</groupId>
             <artifactId>nebula-algorithm</artifactId>
-            <version>2.6.1</version>
+            <version>2.6.2</version>
         </dependency>
     </dependencies>
 </project>

nebula-algorithm/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <artifactId>algorithm</artifactId>
         <groupId>com.vesoft</groupId>
-        <version>2.6.1</version>
+        <version>2.6.2</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -15,7 +15,7 @@
 
     <properties>
         <spark.version>2.4.4</spark.version>
-        <nebula.version>2.6.0</nebula.version>
+        <nebula.version>2.6.2</nebula.version>
         <config.version>1.4.0</config.version>
         <scopt.version>3.7.1</scopt.version>
         <scalatest.version>3.2.0</scalatest.version>
@@ -90,6 +90,17 @@
                         </execution>
                     </executions>
                 </plugin>
+                <plugin>
+                    <groupId>org.sonatype.plugins</groupId>
+                    <artifactId>nexus-staging-maven-plugin</artifactId>
+                    <version>1.6.8</version>
+                    <extensions>true</extensions>
+                    <configuration>
+                        <serverId>ossrh</serverId>
+                        <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+                        <autoReleaseAfterClose>true</autoReleaseAfterClose>
+                    </configuration>
+                </plugin>
                 <plugin>
                     <groupId>org.scala-tools</groupId>
                     <artifactId>maven-scala-plugin</artifactId>

pom.xml

@@ -7,7 +7,7 @@
     <groupId>com.vesoft</groupId>
     <artifactId>algorithm</artifactId>
     <packaging>pom</packaging>
-    <version>2.6.1</version>
+    <version>2.6.2</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>