Updating to latest cellxgene client code

Fixes the build error in the old version. 

Reverted the API version since we changed directions from updating the API to refactoring the server structure instead.

client/package.json

@@ -9,7 +9,8 @@
     "clean": "rimraf build",
     "start": "node server/development.js",
     "lint": "eslint src",
-    "prod": "cross-env NODE_ENV=production PORT=3000 node server/production.js"
+    "prod": "cross-env NODE_ENV=production PORT=3000 node server/production.js",
+    "test": "jest"
   },
   "engineStrict": true,
   "engines": {
@@ -90,6 +91,7 @@
     "gzip-size": "^3.0.0",
     "html-webpack-inline-source-plugin": "0.0.6",
     "html-webpack-plugin": "^2.22.0",
+    "jest": "^23.0.1",
     "jsdom": "^9.4.1",
     "json-loader": "^0.5.4",
     "nyc": "^10.0.0",
@@ -106,5 +108,10 @@
     "webpack-dev-middleware": "^1.6.1",
     "webpack-hot-middleware": "^2.12.2",
     "whatwg-fetch": "^2.0.1"
+  },
+  "jest": {
+    "testMatch": [
+      "**/__tests__/**/?(*.)(spec|test).js?(x)"
+    ]
   }
 }