fix(Responsive): use setState() safely

[layershifter]

Problem

Responsive uses RAF for event handling and it means that setState() will be called after component will be unmounted.

Here is repro on codesandox, just resize preview area multiple times and you will see:

Warning: Can only update a mounted or mounting component. This usually means you called setState, replaceState, or forceUpdate on an unmounted component. This is a no-op.

Please check the code for the Responsive component.

Solution

Use safeSetState in same manner as in the Transition component.

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Based on SO question.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@08c207b). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #2421   +/-   ##
=========================================
  Coverage          ?   99.73%           
=========================================
  Files             ?      154           
  Lines             ?     2692           
  Branches          ?        0           
=========================================
  Hits              ?     2685           
  Misses            ?        7           
  Partials          ?        0

Impacted Files	Coverage Δ
src/addons/Responsive/Responsive.js	100% <100%> (ø)

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[levithomason]

We've had this in a few areas. Seems we might need to find a permanent solution. This works for now, thanks!

[levithomason]

Released in semantic-ui-react@v0.78.0.