fix: modified doc

Author: JimmyDaddy

README.MD

@@ -161,10 +161,10 @@ Marker.markImage({
     })
 })
 
-// you can also use the bundled image for marking
+// you can also use the bundled images for marking
 Marker.markImage({
     src: backGroundUri, 
-    markerSrc: require('./icon.png), 
+    markerSrc: require('./icon.png'), 
     position: 'topLeft',  // topLeft, topCenter,topRight, bottomLeft, bottomCenter , bottomRight, center
     scale: 1, 
     markerScale: 0.5, 

example/example/package.json

@@ -9,7 +9,7 @@
 	"dependencies": {
 		"react": "^16.5.0",
 		"react-native": "^0.57.1",
-		"react-native-image-marker": "0.3.0",
+		"react-native-image-marker": "0.3.1",
 		"react-native-image-picker": "^0.26.7"
 	},
 	"devDependencies": {