fix(Responsive): fix usage of window for SSR

[layershifter]

Fixes #2206.

[codecov-io]

Codecov Report

Merging #2209 into master will increase coverage by 0.07%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2209      +/-   ##
==========================================
+ Coverage   99.65%   99.73%   +0.07%     
==========================================
  Files         151      151              
  Lines        2622     2622              
==========================================
+ Hits         2613     2615       +2     
+ Misses          9        7       -2

Impacted Files	Coverage Δ
src/addons/Responsive/Responsive.js	100% <100%> (ø)	⬆️
src/modules/Search/Search.js	99.46% <0%> (+1.06%)	⬆️

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[levithomason]

Released in semantic-ui-react@0.75.1