Update dependencies to enable Greenkeeper 🌴 (adamisntdead#1)

* chore(package): update dependencies

https://greenkeeper.io/

* docs(readme): add Greenkeeper badge 

https://greenkeeper.io/

Author: greenkeeper[bot]

README.md

@@ -1,5 +1,7 @@
 # Qics - _Quantum Idealistic Computer Simulator_
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/adamisntdead/qics.svg)](https://greenkeeper.io/)
+
 [![GitHub issues](https://img.shields.io/github/issues/adamisntdead/qics.svg)](https://github.com/adamisntdead/qics/issues)
 [![GitHub license](https://img.shields.io/badge/license-Apache%202-blue.svg)](https://raw.githubusercontent.com/adamisntdead/qics/master/LICENSE)
 [![Travis](https://img.shields.io/travis/adamisntdead/qics.svg)](https://travis-ci.org/adamisntdead/qics)

package.json

@@ -40,16 +40,16 @@
   "devDependencies": {
     "babel-cli": "^6.6.5",
     "babel-core": "^6.7.4",
-    "babel-eslint": "^6.0.0",
+    "babel-eslint": "^7.1.1",
     "babel-loader": "^6.2.4",
     "babel-preset-es2015": "^6.6.0",
     "chai": "^3.5.0",
-    "cross-env": "^1.0.7",
+    "cross-env": "^3.1.4",
     "eslint": "^3.1.0",
     "eslint-plugin-import": "^2.0.1",
     "eslint-plugin-prefer-object-spread": "^1.1.0",
     "eslint-plugin-react": "^6.2.0",
-    "mocha": "^2.4.5",
+    "mocha": "^3.2.0",
     "rimraf": "^2.5.2",
     "webpack": "^1.12.14"
   },