change plugin package name in npm

[HarelM]

Although this might be a breaking change I think it will be better to conform to cordova's plugins names convention:
cordova-plugin-universal-links.

[nordnet-deprecation-bot]

👋 Hi! Thank you for your interest in this repo.

😢 We are not using nordnet/cordova-universal-links-plugin anymore, and we lack the manpower and the experience needed to maintain it. We are aware of the inconveniece that this may cause you. Feel free to use it as is, or create your own fork.

🔒 This will now be closed & locked.

ℹ️ Please see #160 for more information.