Update eslint. Suspiciously easy...

Author: timdorr

.eslintrc

@@ -22,7 +22,8 @@
     "valid-jsdoc": 2,
     "react/jsx-uses-react": 1,
     "react/jsx-no-undef": 2,
-    "react/jsx-wrap-multilines": 2
+    "react/jsx-wrap-multilines": 2,
+    "react/no-string-refs": 0
   },
   "plugins": [
     "import",

package.json

@@ -80,9 +80,9 @@
     "create-react-class": "^15.5.3",
     "cross-env": "^5.0.1",
     "es3ify": "^0.2.0",
-    "eslint": "^3.3.1",
+    "eslint": "^4.0.0",
     "eslint-plugin-import": "^2.2.0",
-    "eslint-plugin-react": "^6.1.1",
+    "eslint-plugin-react": "^7.1.0",
     "expect": "^1.8.0",
     "glob": "^7.1.1",
     "istanbul": "^0.4.4",