Added definition file to support TypeScript import

Author: rohanoid5

src/FusionCharts.d.ts

@@ -0,0 +1,10 @@
+import * as React from 'react';
+
+interface State {
+  dataJson: any;
+  schemaJson: any;
+}
+
+declare class FusionCharts extends React.Component<any, State> {}
+
+export default FusionCharts;