update package

build/env.js

@@ -0,0 +1 @@
+export default "development";

package-lock.json

@@ -6295,6 +6295,26 @@
         }
       }
     },
+    "happypack": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/happypack/-/happypack-4.0.1.tgz",
+      "integrity": "sha1-1xplINE8Hd9sxcoEDP4icRy6Ugk=",
+      "dev": true,
+      "requires": {
+        "async": "1.5.0",
+        "json-stringify-safe": "5.0.1",
+        "loader-utils": "1.1.0",
+        "serialize-error": "2.1.0"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.0",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.0.tgz",
+          "integrity": "sha1-J5ZkJyNXOFlWVjP8YnRES+4vjOM=",
+          "dev": true
+        }
+      }
+    },
     "har-schema": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
@@ -12461,6 +12481,12 @@
         }
       }
     },
+    "serialize-error": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/serialize-error/-/serialize-error-2.1.0.tgz",
+      "integrity": "sha1-ULZ51WNc34Rme9yOWa9OW4HV9go=",
+      "dev": true
+    },
     "serialize-javascript": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-1.4.0.tgz",

package.json

@@ -62,6 +62,7 @@
     "extract-text-webpack-plugin": "^3.0.0",
     "file-loader": "^1.1.4",
     "friendly-errors-webpack-plugin": "^1.6.1",
+    "happypack": "^4.0.1",
     "html-webpack-plugin": "^2.30.1",
     "inject-loader": "^3.0.0",
     "karma": "^1.4.1",