Bug fixes: historical data with descending order + JSON output for full historical data

[imad3v]

This pull request fixes 2 bugs in the functions to get the historical data:

1. When order='descending', the data is correctly ordered inside each date interval of 19 years but the date intervals are not ordered between them.
2. When as_json=True, only the first date interval (of 19 years) is returned instead of the full history.

[codecov]

Codecov Report

Merging #237 into master will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #237      +/-   ##
==========================================
+ Coverage   90.92%   90.97%   +0.04%     
==========================================
  Files          26       26              
  Lines        4902     4929      +27     
==========================================
+ Hits         4457     4484      +27     
  Misses        445      445              

[alvarobartt]

Hi @imad3v! Could you please share a simple Jupyter Notebook reproducing the error so that I can check its output to see the bugs? Thanks! 👍🏻

[imad3v]

Hi @imad3v! Could you please share a simple Jupyter Notebook reproducing the error so that I can check its output to see the bugs? Thanks! 👍🏻

Hi @alvarobartt, here is an example: https://github.com/imad3v/investpy/blob/notebook-example/notebooks/Investpy%20bug%20example.ipynb

By the way, thanks for the amazing library!

[alvarobartt]

Thank you @imad3v 🤗 I'll close this before Christmas! BTW happy holidays!