support option to remove space line between each data row

When we use gotabulate 'Simple Table' in our container image build project [isula-build](https://github.com/openeuler-mirror/isula-build) to list images managerd by the daemon, the space line between each item is too sparse. This lead to a full screen page list fewer items as follows:
```
isula-build ctr-img images
---------------------------------------------- ----------- ----------------- ------------------------ ------------
REPOSITORY TAG IMAGE ID CREATED SIZE
---------------------------------------------- ----------- ----------------- ------------------------ ------------
23e3d8bb12ff 2020-11-24 08:11:15 1.45 MB

lzk latest f19434180a1c 2020-11-18 10:54:24 1.44 MB

b6b74a847ff3 2020-11-18 10:54:19 1.44 MB
---------------------------------------------- ----------- ----------------- ------------------------ ------------
```

If there exist an option which can control remove those space line, more items can be display and I think also useful in other scenarios. The result in our project can be:
```
isula-build ctr-img images
---------------------------------------------- ----------- ----------------- ------------------------ ------------
REPOSITORY TAG IMAGE ID CREATED SIZE
---------------------------------------------- ----------- ----------------- ------------------------ ------------
23e3d8bb12ff 2020-11-24 08:11:15 1.45 MB
lzk latest f19434180a1c 2020-11-18 10:54:24 1.44 MB
b6b74a847ff3 2020-11-18 10:54:19 1.44 MB
---------------------------------------------- ----------- ----------------- ------------------------ ------------
```
or
```
isula-build ctr-img images
+----------------------------------------------+-----------+-----------------+------------------------+------------+
| REPOSITORY | TAG | IMAGE ID | CREATED | SIZE |
+==============================================+===========+=================+========================+============+
| | | 23e3d8bb12ff | 2020-11-24 08:11:15 | 1.45 MB |
| | | 71173ee82707 | 2020-11-24 08:09:43 | 1.44 MB |
| | | 5d5db30060ff | 2020-11-24 08:05:46 | 1.44 MB |
| | | bde817fd2249 | 2020-11-20 11:56:34 | 1.44 MB |
| | | 034e08b6cade | 2020-11-20 11:53:06 | 1.44 MB |
| lzk | latest | f19434180a1c | 2020-11-18 10:54:24 | 1.44 MB |
| | | b6b74a847ff3 | 2020-11-18 10:54:19 | 1.44 MB |
| | | 174ad5b1cf49 | 2020-11-16 10:06:29 | 1.44 MB |
| | | f28a219985c1 | 2020-11-16 08:20:17 | 1.44 MB |
+----------------------------------------------+-----------+-----------------+------------------------+------------+
```
For above use it looks more reasonable. In the end, thanks for this project.