add chroma-js, postcss-import, postcss-value-parser

Author: shawnbot

package-lock.json

@@ -46,6 +46,7 @@
     "@storybook/addon-viewport": "5.0.11",
     "@storybook/react": "5.0.11",
     "autoprefixer": "9.4.7",
+    "chroma-js": "^2.0.6",
     "code-blocks": "^1.1.0",
     "colorette": "^1.1.0",
     "css-loader": "1.0.0",
@@ -62,10 +63,12 @@
     "node-fetch": "2.4.0",
     "npm-run-all": "4.1.5",
     "postcss": "7.0.14",
+    "postcss-import": "^12.0.1",
     "postcss-load-config": "2.0.0",
     "postcss-loader": "^2.0.6",
     "postcss-node-sass": "2.1.8",
     "postcss-scss": "2.0.0",
+    "postcss-value-parser": "^4.0.2",
     "prop-types": "^15.6.2",
     "semver": "5.7.1",
     "style-loader": "^0.18.2",