AG-420 Improve React implementation

src/dynamicComponentExample/ParamsRenderer.jsx

@@ -0,0 +1,13 @@
+import React, {Component} from "react";
+
+export default class ParamsRenderer extends Component {
+    constructor(props) {
+        super(props);
+    }
+
+    render() {
+        return (
+            <span>Field: {this.props.colDef.field}, Value: {this.props.value}</span>
+        );
+    }
+};