fix(Angular): add hot loader for lazy loaded NgModules

[sis0k0]

What is the current behavior?

In NativeScript Angular the hot updates are only accepted in the entry file (main.ts). The lazy loaded NgModules are not directly imported anywhere in the dependency graph with root main.ts. That's why the hot updates in lazy modules don't bubble up to the accept in main.ts and HMR doesn't work in lazy modules.

What is the new behavior?

Every lazy loaded NgModule is augmented with HMR self-accept during build by the lazy-ngmodule-hot-loader.

fixes NativeScript/nativescript-angular#1564

BREAKING CHANGES:

The lazy-ngmodule-hot-loader should be added to the webpack configuration.

BEFORE

// webpack.config.js { test: /(?:\.ngfactory\.js|\.ngstyle\.js|\.ts)$/, use: [ "nativescript-dev-webpack/moduleid-compat-loader", "@ngtools/webpack", ] }, // ...

AFTER

// webpack.config.js { test: /(?:\.ngfactory\.js|\.ngstyle\.js|\.ts)$/, use: [ "nativescript-dev-webpack/moduleid-compat-loader", "nativescript-dev-webpack/lazy-ngmodule-hot-loader", "@ngtools/webpack", ] }, // ...