Fix error when .progress = FALSE in gh()

[gadenbuie]

This is a very simple fix for #114 to avoid calling update_progress_bar() when .progress = FALSE.

[codecov-commenter]

Codecov Report

Merging #115 into master will decrease coverage by 6.16%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #115      +/-   ##
==========================================
- Coverage   51.54%   45.37%   -6.17%     
==========================================
  Files          12       12              
  Lines         454      454              
==========================================
- Hits          234      206      -28     
- Misses        220      248      +28     

Impacted Files	Coverage Δ
R/package.R	58.82% <0.00%> (-8.83%)	⬇️
R/gh_whoami.R	41.17% <0.00%> (-58.83%)	⬇️
R/gh_response.R	42.37% <0.00%> (-25.43%)	⬇️

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[gaborcsardi]

Thanks much! Could you please add a bullet point to NEWS.md, thanking yourself? :)

[gadenbuie]

No problem! (Sorry for the force-push, I caught a typo as soon as I pressed "Enter" 😜)

[gaborcsardi]

Great, thanks much!