fix: defaultImage not required

Author: ahmnouira

example/package.json

@@ -22,7 +22,7 @@
     "@types/react-router": "5.1.18",
     "@types/react-router-dom": "5.3.3",
     "babel-jest": "^27.4.6",
-    "ionic-react-header-parallax": "^0.1.8",
+    "ionic-react-header-parallax": "https://github.com/ahmnouira/ionic-react-header-parallax",
     "ionicons": "6.0.1",
     "react": "17.0.2",
     "react-dom": "17.0.2",