Remove unnecessary dependencies

[derekjuber]

1. prop-types should be a regular dep, not peer
2. fusion-tokens was unused except for a test file so it doesn't belong in peer, just dev

[codecov]

Codecov Report

Merging #132 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #132   +/-   ##
=======================================
  Coverage   96.29%   96.29%           
=======================================
  Files           2        2           
  Lines          27       27           
  Branches        4        4           
=======================================
  Hits           26       26           
  Partials        1        1

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[derekjuber]

!merge