I just checked my installed version of ionic framework its beta 3 i want to upgrade to beta 8, i reinstalled using npm globally but i see no difference in version it remained the same beta 3, why is it happening.
Create new project, copy/past your code. Profit!
I would recommend you to check the linked post for a good explanation:
I had an app based on a much earlier beta ionic, I did the same and is much simpler than doing multiple upgrades following this https://github.com/driftyco/ionic/blob/2.0/CHANGELOG.md#ionicons-were-moved