Replace tns-core-modules with @nativescript/core

[ghost]

Hi,

With the release of NativeScript 6.3, almost (if not all tns packages) are now available as scoped packages.

tns-cope-modules remains existing just for compatibility but the, devs recommend switching to @nativescript/core.

Edit:
This change is dependent on

• https://github.com/NativeScript/nativescript-dev-webpack

I think this issue should have low priority because tns-core-modules transparently resolves @nativescript/core.

[halfnelson]

I had a crack at this a couple of weeks ago and ran into the problem that nativescript-dev-webpack still had hard coded references to 'tns-core-modules', The migration wasn't too difficult and I will probably have another shot at it once the nativescript-dev-webpack changes land in production

[halfnelson]

Fixed in 0.8.0