Relax version of react-transition-group

[ApacheEx]

We can relax version of react-transition-group in peerDependencies. I didn't find any breaking changes which block us to do it.

[codecov]

Codecov Report

Merging #22 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #22   +/-   ##
=======================================
  Coverage   98.25%   98.25%           
=======================================
  Files           8        8           
  Lines         286      286           
  Branches       65       65           
=======================================
  Hits          281      281           
  Misses          4        4           
  Partials        1        1           

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