Merge pull request #3402 from taosdata/TD-1259

jdbcDemo use the taos-jdbcdriver-2.0.4

tests/examples/JDBC/JDBCDemo/pom.xml

@@ -63,7 +63,7 @@
         <dependency>
             <groupId>com.taosdata.jdbc</groupId>
             <artifactId>taos-jdbcdriver</artifactId>
-            <version>2.0.2</version>
+            <version>2.0.4</version>
         </dependency>
     </dependencies>
 </project>