Support for @nativescript/theme v2

[Fatme]

Is your feature request related to a problem? Please describe.

The new code-shared applications should be created with @nativescript/theme v2 as dependency in package.json and should work with it.

Describe the solution you'd like
Add @nativescript/theme@~2.2.0 as dependency in package.json.

Describe alternatives you've considered

Additional context
As all NativeScript related templates are updated to use @nativescript/theme v2 by default, code-shared applications should be created with @nativescript/theme v2 by default as well.

Acceptance criteria:

• ng new myApp & ng add @nativescript/schematics@next should create application with @nativescript/theme v2 by default
• ng new --collection=<path to collection.json from the @nativescript/schematics@next> myApp --shared should create application with @nativescript/theme v2 by default
• ng new --collection=<path to collection.json from the @nativescript/schematics@next> myApp should create application with @nativescript/theme v2 by default