upgrade jest

Author: jscottsmith

package.json

@@ -50,7 +50,7 @@
     "cross-env": "^3.1.4",
     "css-loader": "^0.28.0",
     "express": "^4.14.1",
-    "jest": "^20.0.4",
+    "jest": "22.0.6",
     "node-sass": "^4.5.0",
     "postcss-loader": "^1.3.3",
     "regenerator-runtime": "^0.10.5",