React: Upgrade to react-devtools@^3.4.0
React: Upgrade to react-devtools@^3.4.0

Summary:
Upgrades to `react-devtools@^3.4.0`.

Notably, this brings the improved coloring to the React Profiler.

Reviewed By: bvaughn

Differential Revision: D9985352

fbshipit-source-id: 64a76d194275e551f04dd52d775bf26bb16df6b8

exponent/react-native,javache/react-native,javache/react-native,myntra/react-native,hammerandchisel/react-native,exponent/react-native,hoangpham95/react-native,hoangpham95/react-native,hoangpham95/react-native,exponentjs/react-native,janicduplessis/react-native,facebook/react-native,exponent/react-native,myntra/react-native,hoangpham95/react-native,hoangpham95/react-native,javache/react-native,javache/react-native,facebook/react-native,myntra/react-native,exponent/react-native,janicduplessis/react-native,myntra/react-native,exponentjs/react-native,pandiaraj44/react-native,javache/react-native,facebook/react-native,pandiaraj44/react-native,hammerandchisel/react-native,hoangpham95/react-native,janicduplessis/react-native,javache/react-native,exponentjs/react-native,arthuralee/react-native,hoangpham95/react-native,pandiaraj44/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hammerandchisel/react-native,hammerandchisel/react-native,hammerandchisel/react-native,exponentjs/react-native,exponentjs/react-native,janicduplessis/react-native,javache/react-native,janicduplessis/react-native,pandiaraj44/react-native,javache/react-native,janicduplessis/react-native,exponentjs/react-native,janicduplessis/react-native,facebook/react-native,exponent/react-native,exponent/react-native,exponent/react-native,hammerandchisel/react-native,arthuralee/react-native,janicduplessis/react-native,exponentjs/react-native,hammerandchisel/react-native,pandiaraj44/react-native,myntra/react-native,myntra/react-native,myntra/react-native,facebook/react-native,facebook/react-native,pandiaraj44/react-native,exponentjs/react-native,arthuralee/react-native,facebook/react-native,myntra/react-native,arthuralee/react-native,facebook/react-native,hoangpham95/react-native,exponent/react-native,pandiaraj44/react-native,javache/react-native,myntra/react-native,facebook/react-native,arthuralee/react-native