add stack-overflow icon to prop type

[kallefrombosnia]

Removed stack-overflow type from list since it doesnt exists in TypeScript type (SocialMediaType)

Supported types:

export type SocialMediaType =
| 'facebook'
| 'twitter'
| 'google-plus-official'
| 'google'
| 'pinterest'
| 'linkedin'
| 'youtube'
| 'vimeo'
| 'tumblr'
| 'instagram'
| 'quora'
| 'flickr'
| 'foursquare'
| 'wordpress'
| 'stumbleupon'
| 'github'
| 'github-alt'
| 'twitch'
| 'medium'
| 'soundcloud'
| 'gitlab'
| 'angellist'
| 'codepen'
| 'weibo'
| 'vk';

[codecov]

Codecov Report

Merging #2731 (b839d21) into next (0328937) will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             next    #2731      +/-   ##
==========================================
- Coverage   93.29%   93.22%   -0.08%     
==========================================
  Files          45       45              
  Lines         761      753       -8     
  Branches       93       92       -1     
==========================================
- Hits          710      702       -8     
  Misses         47       47              
  Partials        4        4              

Impacted Files	Coverage Δ
src/buttons/Button.js	100.00% <0.00%> (ø)
src/bottomSheet/BottomSheet.js	100.00% <0.00%> (ø)

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[flyingcircle]

stack-overflow is a valid option, so it needs to be added to the type file, not removed from the documentation.