Prep v4.2.2 release

[jadchaar]

Closes: #77
Closes: #84

[codecov]

Codecov Report

Merging #86 (608948d) into master (dc26c38) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #86   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          163       175   +12     
  Branches        26        29    +3     
=========================================
+ Hits           163       175   +12     

Impacted Files	Coverage Δ
sec_edgar_downloader/Downloader.py	100.00% <100.00%> (ø)
sec_edgar_downloader/_utils.py	100.00% <100.00%> (ø)
sec_edgar_downloader/_version.py	100.00% <100.00%> (ø)

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