Added "mediodía" and "medianoche" spanish words

[christianfm10]

I've added 'mediodía' and 'medianoche' spanish words and a test for both cases
This fixes #472
Before this feature:

>>> import dateparser
>>> dateparser.parse('mediodía') #This is noon in Spanish.
>>> dateparser.parse('medianoche') #This is midnight in Spanish.

After this feature:

>>> import dateparser
>>> dateparser.parse('mediodía') #This is noon in Spanish.
datetime.datetime(2019, 1, 11, 12, 0)
>>> dateparser.parse('medianoche') #This is midnight in Spanish.
datetime.datetime(2019, 1, 11, 0, 0)

[codecov]

Codecov Report

Merging #476 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #476      +/-   ##
==========================================
+ Coverage   94.99%   94.99%   +<.01%     
==========================================
  Files         302      302              
  Lines        2457     2459       +2     
==========================================
+ Hits         2334     2336       +2     
  Misses        123      123

Impacted Files	Coverage Δ
dateparser/data/date_translation_data/es.py	100% <ø> (ø)	⬆️
dateparser/timezone_parser.py	97.91% <0%> (+0.09%)	⬆️

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[eLRuLL]

@christianfm10 please share some scripts with usage from before and after these new feature, with some examples on what kind of phrases this could be helpful. Thanks.

[eLRuLL]

@christianfm10 please add a trailing comma here and also an extra newline at the end of the file. Thanks

[noviluni]

This file shouldn't be edited directly, instead he should run the write_complete_data.py script that generates the json file from the .yaml file.

[Gallaecio]

@christianfm10 Do you plan to continue working on this? Otherwise, would you mind if I take over? I see this only needs dealing with @eLRuLL’s feedback, maybe adding “la” to the list of words (since there is “el”), and adding tests that cover the use of those words to be ignored.

[noviluni]

This file shouldn't be edited directly, instead he should run the write_complete_data.py script that generates the json file from the .yaml file.