Add chromatism.js

https://github.com/graypegg/chromatism

package.json

@@ -56,6 +56,7 @@
     "babel-plugin-transform-react-remove-prop-types": "^0.4.24",
     "babel-runtime": "^6.26.0",
     "blurhash": "^1.0.0",
+    "chromatism": "^3.0.0",
     "classnames": "^2.2.5",
     "compression-webpack-plugin": "^3.0.0",
     "cross-env": "^6.0.0",

yarn.lock

@@ -2445,6 +2445,11 @@ chownr@^1.1.1:
   resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.1.tgz#54726b8b8fff4df053c42187e801fb4412df1494"
   integrity sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g==
 
+chromatism@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/chromatism/-/chromatism-3.0.0.tgz#a7249d353c1e4f3577e444ac41171c4e2e624b12"
+  integrity sha1-pySdNTweTzV35ESsQRccTi5iSxI=
+
 chrome-trace-event@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/chrome-trace-event/-/chrome-trace-event-1.0.2.tgz#234090ee97c7d4ad1a2c4beae27505deffc608a4"