Upgrade devDeps (#95)

Author: ericf

.travis.yml

@@ -1,7 +1,6 @@
 sudo: false
 language: node_js
 node_js:
-    - 0.12
     - 4.2
     - 5
     - 6

package.json

@@ -22,8 +22,8 @@
     "babel-preset-es2015": "^6.1.18",
     "babel-preset-react": "^6.11.1",
     "babel-register": "^6.11.6",
-    "cross-env": "^2.0.0",
-    "eslint": "^2.9.0",
+    "cross-env": "^3.1.4",
+    "eslint": "^3.14.1",
     "eslint-plugin-react": "^6.1.2",
     "mocha": "^3.0.2",
     "power-assert": "^1.4.1",