update Src/Asp.NetCore2/SqlSugar.TDengineCore/TDengine/CodeFirst/TDengineCodeFirst.cs.

修复float类型错误

Signed-off-by: 逐浪人 <zhulangren@gmail.com>

Src/Asp.NetCore2/SqlSugar.TDengineCore/TDengine/CodeFirst/TDengineCodeFirst.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -157,6 +157,7 @@ namespace SqlSugar.TDengine
                 case "double":
                     return "DOUBLE";
                 case "float":
+                case "single":
                     return "FLOAT";
                 case "int":
                     return "INT";