fix(prettyRoles): crash in older browsers

[eps1lon]

What:

Fixes crash when logging roles in older browsers (namely IE11)

Why:

Objec.entries is not implemented in older browsers

How:

Use Object.keys

Checklist:

• [ ] Documentation added to the
  docs site
• [ ] I've prepared a PR for types targeting
  DefinitelyTyped
• Tests (Testing codesandbox canary on Material-UI)
• Ready to be merged
  

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[codecov]

Codecov Report

Merging #464 into beta will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              beta      #464   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           22        22           
  Lines          419       420    +1     
  Branches       100       100           
=========================================
+ Hits           419       420    +1     

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[kentcdodds]

Sure 👍

[eps1lon]

Requires a bit more work (jestjs/jest#9635) but doesn't hurt to get this in anyway. At least this way I can hopefully fall back to pretty-format@24