fix: Update peer dependency to React 16 (#16)

Closes #15

Author: Wartybliggens

package.json

@@ -72,8 +72,8 @@
     "semantic-release": "^6.3.6"
   },
   "peerDependencies": {
-    "react": "0.14.x || 15.x",
-    "react-dom": "0.14.x || 15.x",
+    "react": "0.14.x || 15.x || 16.x",
+    "react-dom": "0.14.x || 15.x || 16.x",
     "prop-types": "^15.x"
   },
   "dependencies": {}