Update outdated dev deps

Author: Uku Pattak

package.json

@@ -46,8 +46,8 @@
   "devDependencies": {
     "babel-cli": "^6.14.0",
     "babel-core": "^6.11.4",
-    "babel-eslint": "^6.1.2",
-    "babel-jest": "^15.0.0",
+    "babel-eslint": "^7.1.0",
+    "babel-jest": "^17.0.2",
     "babel-loader": "^6.2.4",
     "babel-plugin-add-module-exports": "^0.2.1",
     "babel-plugin-transform-class-properties": "^6.11.5",
@@ -57,9 +57,9 @@
     "babel-plugin-transform-object-rest-spread": "^6.8.0",
     "babel-plugin-transform-runtime": "^6.8.0",
     "babel-preset-es2015": "^6.14.0",
-    "cross-env": "^2.0.1",
+    "cross-env": "^3.1.3",
     "eslint": "^3.1.1",
-    "jest": "^15.1.1",
+    "jest": "^17.0.2",
     "rimraf": "^2.3.4",
     "webpack": "^1.13.1"
   },