Update sample dependency to point to the repo directly (#685)

* update dependency

* Updating package version

* adds readme

* Updating JS files

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

example/README.md

@@ -0,0 +1,6 @@
+# Usage
+
+1. Install dependencies by running `yarn install`. This will also run `pod install` for iOS automatically.
+2. Build and run the app by running:
+   - iOS: `yarn ios` 
+   - Android: `yarn android`

example/package.json

@@ -16,7 +16,7 @@
     "deprecated-react-native-prop-types": "^2.3.0",
     "react": "^18.0.0",
     "react-native": "^0.69.1",
-    "react-native-pdftron": "file:../"
+    "react-native-pdftron": "github:PDFTron/pdftron-react-native"
   },
   "devDependencies": {
     "@babel/core": "^7.12.9",

lib/src/DocumentView/DocumentView.js

@@ -883,7 +883,7 @@ export class DocumentView extends PureComponent {
     setColorPostProcessMode = (colorPostProcessMode) => {
         const tag = findNodeHandle(this._viewerRef);
         if (tag != null) {
-            DocumentViewManager.setColorPostProcessMode(tag, colorPostProcessMode);
+            return DocumentViewManager.setColorPostProcessMode(tag, colorPostProcessMode);
         }
         return Promise.resolve();
     };

package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-native-pdftron",
   "title": "React Native Pdftron",
-  "version": "3.0.4-2",
+  "version": "3.0.4-3",
   "description": "React Native Pdftron",
   "main": "./lib/index.js",
   "typings": "index.ts",