changes in this commit:

- assert the output of the method `get_ner`
   when argument `tag` is set to True
   for all 13 tags as described in
   (https://github.com/wannaphongcom/thai-ner/tree/master/model/1.2)

- assert the output of the method `get_ner`
   when argument `pos` is set to True

- asser the output of the method `get_ner`
   when argument `pos` is set to False

As thainer version 1.2 provide different results from previous version