Problem with yandex translation.

[giyeol]

I get a JSONDecodeError error when trying to translate yandex.

>>> print(ts.yandex('hello', 'en', 'zh'))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.6/dist-packages/translators/apis.py", line 921, in yandex_api
    data = r.json()
  File "/usr/local/lib/python3.6/dist-packages/requests/models.py", line 898, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Also, in case of language detection, I get a 403 error.

>>> print(ts.yandex('hello'))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.6/dist-packages/translators/apis.py", line 910, in yandex_api
    from_language = self.detect_language(ss, query_text, self.sid, proxies) if from_language=='auto' else from_language
  File "/usr/local/lib/python3.6/dist-packages/translators/apis.py", line 879, in detect_language
    r.raise_for_status()
  File "/usr/local/lib/python3.6/dist-packages/requests/models.py", line 941, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 403 Client Error: Forbidden for url: https://translate.yandex.net/api/v1/tr.json/detect?sid=....&srv=tr-text&text=hello&hint=zh%2Cen&options=1

[UlionTse]

@giyeol Please upgrade it to v4.7.6