feat: Update version to 1.4.0 in README and remove deprecated package formats from package.json

Author: utmp

README.md

@@ -2,7 +2,7 @@
 
 A fast, private, and user-friendly desktop file conversion application. Convert images, documents, videos, and audio files - all processed locally on your machine.
 
-![Version](https://img.shields.io/badge/version-1.3.3-blue)
+![Version](https://img.shields.io/badge/version-1.4.0-blue)
 ![License](https://img.shields.io/badge/license-GPL--3.0-green)
 ![Platform](https://img.shields.io/badge/platform-Linux-lightgrey)
 

package.json

@@ -29,8 +29,6 @@
       "target": [
         "AppImage",
         "snap",
-        "deb",
-        "rpm",
         "tar.gz",
         "zip",
         "7z"