Fix destructuring bug in Status

[sumanvyj]

When Status is rendered in the browser I get TypeError: Cannot read property 'staticContext' of undefined. It looks like this is because Status expects router to be present as a property of context. This is the case for ServerRouter but not for BrowserRouter.

By destructuring with a default value of {} for router, staticContext is correctly set to undefined when router doesn't exist.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@17aa5bd). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master     #231   +/-   ##
=========================================
  Coverage          ?   79.26%           
=========================================
  Files             ?       10           
  Lines             ?      217           
  Branches          ?       48           
=========================================
  Hits              ?      172           
  Misses            ?       30           
  Partials          ?       15

Impacted Files	Coverage Δ
src/modules/Status.js	90.9% <100%> (ø)

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[sumanvyj]

one last tweak to fix the type

[KevinGrandon]

!merge

[old-fusion-bot]

Triggered Fusion.js build verification: https://buildkite.com/uberopensource/fusion-release-verification/builds/1561