Prepare for version 0.14.0 release

[hydrosquall]

Summary of Changes

• Prepare for [platform] End support for Python 2 + Python 3.5 #601
• Release the changes from @atarax in Feature/fundamentals #581 and the bugfix from Update get_news() to work when no sources are provided. #569 by @minnend .

[codecov]

Codecov Report

Merging #605 (62b51b5) into master (6dc49a3) will decrease coverage by 1.56%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #605      +/-   ##
==========================================
- Coverage   95.29%   93.72%   -1.57%     
==========================================
  Files           5        5              
  Lines         255      255              
==========================================
- Hits          243      239       -4     
- Misses         12       16       +4     

Impacted Files	Coverage Δ
tiingo/__version__.py	0.00% <0.00%> (ø)
tiingo/api.py	93.18% <0.00%> (-1.82%)	⬇️

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