fix show "rippleJSfalse" at rippleJS element

Author: michioxd

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-ripplejs",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "Vanilla Material Design Ripple Effect implement for ReactJS",
   "main": "dist/index.js",
   "type": "module",

src/index.tsx

@@ -133,7 +133,7 @@ export default function Ripple(props: RippleJS) {
     return (
         <div {...props} style={{ position: 'relative', ...props.style }} ref={RippleElementRef}>
             {props.children}
-            <div className={"rippleJS" + (props.fill === true && " fill")}></div>
+            <div className={"rippleJS" + (props.fill === true ? " fill" : "")}></div>
         </div>
     )
 }