fix: Update peerDependencies to support React 16 (#43)

Author: TarikHuber

package.json

@@ -56,8 +56,8 @@
     "prop-types": "^15.5.8"
   },
   "peerDependencies": {
-    "react": "^0.14.0 || ^15.0.0",
-    "react-dom": "^0.14.0 || ^15.0.0"
+    "react": "^0.14.0 || ^15.0.0 || 16.x",
+    "react-dom": "^0.14.0 || ^15.0.0 || 16.x"
   },
   "devDependencies": {
     "babel": "^6.23.0",