Increase config.py coverage

[jefersondaniel]

Addresses #420

[SendGridDX]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #427 into master will increase coverage by 0.4%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #427     +/-   ##
=========================================
+ Coverage   81.98%   82.38%   +0.4%     
=========================================
  Files           9        9             
  Lines         999      999             
  Branches      160      160             
=========================================
+ Hits          819      823      +4     
+ Misses         90       86      -4     
  Partials       90       90

Impacted Files	Coverage Δ
sendgrid/helpers/inbound/config.py	93.54% <0%> (+12.9%)	⬆️

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[mbernier]

Beautiful! Thank you!

[thinkingserious]

Hello @jefersondaniel,

Thanks again for the PR!

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