Update dependencies, enhance README, and improve script handling (#213)

- Upgraded various dependencies in package.json and package-lock.json, including Babel, Webpack, and ESLint packages to their latest versions for improved performance and security.
- Added new development scripts for easier local development (`dev` and `prod`).
- Updated README to reflect compatibility with both Chromium and Firefox browsers.
- Enhanced the update-index script to properly escape special characters in the Instagram script, ensuring correct functionality.

This commit improves the overall development experience and ensures the project is up-to-date with the latest package versions.

README.md

@@ -42,11 +42,12 @@ This version utilizes the Instagram API for better performance.
 10. With the latest version, you can now tweak and customize the timings of the script. You can do this by clicking on the "Settings" button.
 
  <img src="./assets/settings.png" alt="Settings screen" />
+
 ## Notes
 
 **_The more users you have to check, more time it will take_**
 
-**_This script has been tested only on Chromium-based browsers_**
+**_The latest version of the script runs both on chromium and firefox based browsers_**
 
 ## DEV