update version to 3.1.0

Author: Nicole00

example/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>algorithm</artifactId>
         <groupId>com.vesoft</groupId>
-        <version>3.0-SNAPSHOT</version>
+        <version>3.1.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -182,7 +182,7 @@
         <dependency>
             <groupId>com.vesoft</groupId>
             <artifactId>nebula-algorithm</artifactId>
-            <version>3.0-SNAPSHOT</version>
+            <version>${project.version}</version>
         </dependency>
     </dependencies>
 </project>

nebula-algorithm/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <artifactId>algorithm</artifactId>
         <groupId>com.vesoft</groupId>
-        <version>3.0-SNAPSHOT</version>
+        <version>3.1.0</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>3.0-SNAPSHOT</nebula.version>
+        <nebula.version>3.4.0</nebula.version>
         <config.version>1.4.0</config.version>
         <scopt.version>3.7.1</scopt.version>
         <scalatest.version>3.2.0</scalatest.version>

pom.xml

@@ -7,7 +7,7 @@
     <groupId>com.vesoft</groupId>
     <artifactId>algorithm</artifactId>
     <packaging>pom</packaging>
-    <version>3.0-SNAPSHOT</version>
+    <version>3.1.0</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>