add css-inject dep

package.json

@@ -22,6 +22,7 @@
     "babel-plugin-transform-object-assign": "^6.22.0",
     "babelify": "^7.3.0",
     "browserify": "^13.0.1",
+    "csjs-inject": "^1.0.1",
     "ethereum-common": "0.0.18",
     "ethereumjs-block": "^1.2.2",
     "ethereumjs-tx": "^1.1.1",