TASK: Remove greenkeeper ignore list

Also moving jest to the development dependencies.

Author: markusguenther

package.json

@@ -22,8 +22,7 @@
   ],
   "dependencies": {
     "hoist-non-react-statics": "^3.0.1",
-    "invariant": "^2.2.4",
-    "jest": "^23.4.2"
+    "invariant": "^2.2.4"
   },
   "devDependencies": {
     "@types/react": "^16.4.7",
@@ -39,6 +38,7 @@
     "eslint-plugin-prettier": "^2.6.2",
     "eslint-plugin-react": "^7.10.0",
     "fbjs": "^0.8.17",
+    "jest": "^23.4.2",
     "jsdom": "^9.8.3",
     "prettier": "^1.14.0",
     "prop-types": "^15.6.2",
@@ -69,11 +69,6 @@
     "lib": "lib",
     "test": "test"
   },
-  "greenkeeper": {
-    "ignore": [
-      "jsdom"
-    ]
-  },
   "jest": {
     "verbose": true,
     "testURL": "http://localhost/"