Add a script to update the README table of supported languages and locales

[Gallaecio]

Partial fix for #397.

Although sorted, the table contents are the same. Should the script be feeding additional languages and locales from sources other than dateparser.data.languages_info.language_locale_dict?

[codecov]

Codecov Report

Merging #601 (d19b1a3) into master (939e722) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #601      +/-   ##
==========================================
+ Coverage   98.33%   98.37%   +0.03%     
==========================================
  Files         231      231              
  Lines        2590     2591       +1     
==========================================
+ Hits         2547     2549       +2     
+ Misses         43       42       -1     

Impacted Files	Coverage Δ
dateparser/date.py	100.00% <0.00%> (ø)
dateparser/languages/dictionary.py	100.00% <0.00%> (+0.67%)	⬆️

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[noviluni]

I like the idea, but I don't think adding such a big table of supported locales to the README has any sense, so I will keep this PR open until we finish this: #723 and then we can work on this, to see if we want to move that table to the docs or whatever.

[noviluni]

Hi @Gallaecio!

This work would help a lot when updating the CLDR data: #826

The table was moved to the docs (supported_locales.rst). Could you update the code to work with it?

Regarding the source, I think it's OK to extract the language list from dateparser.data.languages_info.language_locale_dict. We could also get the list of supported locales from the modules in dateparser.data.date_translation_data, while the derived locales (locale + region) are in the locale_specific key, but I think that this is too tricky and it should be the same.

[noviluni]

Great! 💪