Revert "build: update version"

This reverts commit f922180.

Author: rithik-dev

pubspec.yaml

@@ -1,6 +1,6 @@
 name: firebase_notifications_handler
 description: Simple notifications handler which provides callbacks like onTap which really make it easy to handle notification taps and a lot more.
-version: 2.0.0+1
+version: 2.0.0
 homepage: https://github.com/rithik-dev/firebase_notifications_handler
 issue_tracker: https://github.com/rithik-dev/firebase_notifications_handler/issues