Se le agrega export default a index.js

Se sube a version 1.0.7
Se sube a GitHub 1.0.7
Se sube a NPM 1.0.7

package.json

@@ -1,6 +1,6 @@
 {
   "name": "chartjs-2-react",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "description": "Libreria de chart.js para React.js",
   "author": "aleleba",
   "license": "MIT",

src/index.js

@@ -1,3 +1,3 @@
 import RadialGaugue from './RadialGauge.jsx';
 
-export { RadialGaugue }
+export default { RadialGaugue }