change version to '2.0.0-alpha'

sql/dolphinscheduler_h2.sql

@@ -956,7 +956,7 @@ CREATE TABLE t_ds_version
 -- Records of t_ds_version
 -- ----------------------------
 INSERT INTO t_ds_version
-VALUES ('1', '1.4.0');
+VALUES ('1', '2.0.0-alpha');
 
 
 -- ----------------------------

sql/dolphinscheduler_mysql.sql

@@ -938,7 +938,7 @@ CREATE TABLE `t_ds_version` (
 -- ----------------------------
 -- Records of t_ds_version
 -- ----------------------------
-INSERT INTO `t_ds_version` VALUES ('1', '1.4.0');
+INSERT INTO `t_ds_version` VALUES ('1', '2.0.0-alpha');
 
 
 -- ----------------------------

sql/dolphinscheduler_postgre.sql

@@ -923,7 +923,7 @@ INSERT INTO t_ds_queue(queue_name, queue, create_time, update_time)
 VALUES ('default', 'default', '2018-11-29 10:22:33', '2018-11-29 10:22:33');
 
 -- Records of t_ds_queue,default queue name : default
-INSERT INTO t_ds_version(version) VALUES ('1.4.0');
+INSERT INTO t_ds_version(version) VALUES ('2.0.0-alpha');
 
 --
 -- Table structure for table t_ds_plugin_define