Made react a peer dependency for all packages.

[thdk]

Fixes #616

[codecov-io]

Codecov Report

Merging #940 into rc0.14.0 will decrease coverage by 0.09%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           rc0.14.0     #940     +/-   ##
===========================================
- Coverage     94.08%   93.99%   -0.1%     
===========================================
  Files            86       85      -1     
  Lines          3637     3599     -38     
  Branches        573      568      -5     
===========================================
- Hits           3422     3383     -39     
  Misses           90       90             
- Partials        125      126      +1

Impacted Files	Coverage Δ
packages/text-field/index.tsx	97.48% <0%> (-0.79%)	⬇️
packages/tab/index.tsx	95.55% <0%> (-0.05%)	⬇️
packages/list/ListItem.tsx	99.01% <0%> (ø)	⬆️
packages/switch/index.tsx	100% <0%> (ø)	⬆️
packages/text-field/character-counter/index.tsx
packages/top-app-bar/index.tsx	98.26% <0%> (+0.13%)	⬆️

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[moog16]

This is great! Thanks so much - Could you please sign the CLA by commenting "I signed it".

[thdk]

I signed it.