Update tatoeba to v2021-07-22
CONTRIBUTOR
How about this? @lhoestq @abhishekkrthakur 
2021-11-07T03:39:59Z
https://github.com/huggingface/datasets/pull/3225#issuecomment-962546905
https://api.github.com/repos/huggingface/datasets/issues/3225
IC_kwDODunzps45X0zZ
https://api.github.com/repos/huggingface/datasets/issues/comments/962546905/reactions
2021-11-07T03:39:59Z
https://api.github.com/repos/huggingface/datasets/issues/comments/962546905
https://avatars.githubusercontent.com/u/15098598?v=4
https://api.github.com/users/KoichiYasuoka/events{/privacy}
https://api.github.com/users/KoichiYasuoka/followers
https://api.github.com/users/KoichiYasuoka/following{/other_user}
https://api.github.com/users/KoichiYasuoka/gists{/gist_id}
https://github.com/KoichiYasuoka
KoichiYasuoka
MDQ6VXNlcjE1MDk4NTk4
https://api.github.com/users/KoichiYasuoka/orgs
https://api.github.com/users/KoichiYasuoka/received_events
https://api.github.com/users/KoichiYasuoka/repos
https://api.github.com/users/KoichiYasuoka/starred{/owner}{/repo}
https://api.github.com/users/KoichiYasuoka/subscriptions
User
https://api.github.com/users/KoichiYasuoka
public
MEMBER
Hi ! I think it would be nice if people could still be able to load the old version.
Maybe this can be a parameter ? For example to load the old version they could do
```python
load_dataset("tatoeba", lang1="en", lang2="mr", date="v2020-11-09")
```

If it sounds good to you, we can add this parameter to the TatoebaConfig:
```python
class TatoebaConfig(datasets.BuilderConfig):
    def __init__(self, *args, lang1=None, lang2=None, date="v2021-07-22", **kwargs):
    self.date = date
```
and then pass the date to the URL
```python
_BASE_URL = "https://object.pouta.csc.fi/OPUS-Tatoeba/{}/moses/{}-{}.txt.zip"
```
```python
        def _base_url(lang1, lang2, date):
            return _BASE_URL.format(date, lang1, lang2)
```

What do you think ?
2021-11-08T14:10:34Z
https://github.com/huggingface/datasets/pull/3225#issuecomment-963196831
https://api.github.com/repos/huggingface/datasets/issues/3225
IC_kwDODunzps45aTef
https://api.github.com/repos/huggingface/datasets/issues/comments/963196831/reactions
2021-11-08T14:10:34Z
https://api.github.com/repos/huggingface/datasets/issues/comments/963196831
https://avatars.githubusercontent.com/u/42851186?v=4
https://api.github.com/users/lhoestq/events{/privacy}
https://api.github.com/users/lhoestq/followers
https://api.github.com/users/lhoestq/following{/other_user}
https://api.github.com/users/lhoestq/gists{/gist_id}
https://github.com/lhoestq
lhoestq
MDQ6VXNlcjQyODUxMTg2
https://api.github.com/users/lhoestq/orgs
https://api.github.com/users/lhoestq/received_events
https://api.github.com/users/lhoestq/repos
https://api.github.com/users/lhoestq/starred{/owner}{/repo}
https://api.github.com/users/lhoestq/subscriptions
User
https://api.github.com/users/lhoestq
public
CONTRIBUTOR
`_DATE = "v" + "-".join(s.zfill(2) for s in _VERSION.split("."))` seems rather tricky but works well. How about this? @lhoestq 

2021-11-10T07:29:26Z
https://github.com/huggingface/datasets/pull/3225#issuecomment-964854650
https://api.github.com/repos/huggingface/datasets/issues/3225
IC_kwDODunzps45goN6
https://api.github.com/repos/huggingface/datasets/issues/comments/964854650/reactions
2021-11-10T07:29:26Z
https://api.github.com/repos/huggingface/datasets/issues/comments/964854650
https://avatars.githubusercontent.com/u/15098598?v=4
https://api.github.com/users/KoichiYasuoka/events{/privacy}
https://api.github.com/users/KoichiYasuoka/followers
https://api.github.com/users/KoichiYasuoka/following{/other_user}
https://api.github.com/users/KoichiYasuoka/gists{/gist_id}
https://github.com/KoichiYasuoka
KoichiYasuoka
MDQ6VXNlcjE1MDk4NTk4
https://api.github.com/users/KoichiYasuoka/orgs
https://api.github.com/users/KoichiYasuoka/received_events
https://api.github.com/users/KoichiYasuoka/repos
https://api.github.com/users/KoichiYasuoka/starred{/owner}{/repo}
https://api.github.com/users/KoichiYasuoka/subscriptions
User
https://api.github.com/users/KoichiYasuoka
public
MEMBER
The CI is only failing because of the missing sections in the dataset card, and because of an issue with the CER metric that is unrelated to this PR
2021-11-12T11:13:07Z
https://github.com/huggingface/datasets/pull/3225#issuecomment-967020419
https://api.github.com/repos/huggingface/datasets/issues/3225
IC_kwDODunzps45o4-D
https://api.github.com/repos/huggingface/datasets/issues/comments/967020419/reactions
2021-11-12T11:13:07Z
https://api.github.com/repos/huggingface/datasets/issues/comments/967020419
https://avatars.githubusercontent.com/u/42851186?v=4
https://api.github.com/users/lhoestq/events{/privacy}
https://api.github.com/users/lhoestq/followers
https://api.github.com/users/lhoestq/following{/other_user}
https://api.github.com/users/lhoestq/gists{/gist_id}
https://github.com/lhoestq
lhoestq
MDQ6VXNlcjQyODUxMTg2
https://api.github.com/users/lhoestq/orgs
https://api.github.com/users/lhoestq/received_events
https://api.github.com/users/lhoestq/repos
https://api.github.com/users/lhoestq/starred{/owner}{/repo}
https://api.github.com/users/lhoestq/subscriptions
User
https://api.github.com/users/lhoestq
public
Tatoeba's latest version is v2021-07-22