Packge upgrade

Author: beldur

package.json

@@ -46,7 +46,7 @@
     "babel-preset-react": "^6.23.0",
     "cross-env": "^4.0.0",
     "enzyme": "^2.7.1",
-    "jest": "^19.0.2",
+    "jest": "^20.0.0",
     "prop-types": "^15.5.8",
     "react": "^15.4.2",
     "react-addons-test-utils": "^15.4.2",