update devDependencies

* AVA 0.16.0 https://github.com/avajs/ava/releases/tag/v0.16.0
* ESLint 3.x http://eslint.org/docs/user-guide/migrating-to-3.0.0

package.json

@@ -43,12 +43,12 @@
     "sum-up-bin": "^0.0.0"
   },
   "devDependencies": {
-    "@shinnn/eslint-config-cli": "^1.0.0",
-    "ava": "^0.15.2",
-    "babel-eslint": "^6.1.0",
-    "eslint": "^2.13.1",
+    "@shinnn/eslint-config-cli": "^2.0.0",
+    "ava": "^0.16.0",
+    "babel-eslint": "^6.1.2",
+    "eslint": "^3.2.2",
     "execa": "^0.4.0",
-    "nyc": "^6.6.1",
+    "nyc": "^7.1.0",
     "object-values": "^1.0.0"
   }
 }