fix(package): update chalk to version 4.0.0

Closes #39

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "babel-preset-es2015": "^6.9.0",
     "babel-preset-react": "^6.5.0",
     "babel-preset-stage-0": "^6.5.0",
-    "chalk": "1.1.3",
+    "chalk": "4.0.0",
     "codemirror": "5.20.2",
     "cross-env": "^3.1.3",
     "css-loader": "0.25.0",