fix: avoid getting js template in a ts project

[DimitarTachev]

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What is the current behavior?

We don't have the typescript dependency hardcoded in our templates anymore and we depend on the nativescript-dev-typescript postinstall script to generate it.

It seems that npm is executing the postintalls script in alphabetical order and the nativescript-dev-typescript plugin is generating the typescript dependency before the postintall script of nativescript-dev-webpack. In this way, everything is working as expected.

However, when the NativeScript CLI is used with yarn instead of npm, the postinstall scripts are run in parallell and the nativescript-dev-webpack plugin is copying the javascript webpack.config instead of the typescript one because the typescript dependency is still missing.

What is the new behavior?

We don't have a hidden dependency to the nativescript-dev-typescript plugin anymore because we depend on nativescript-dev-typescript dependency which is part of the templates.

Related to: #716

[sis0k0]

There are some bits in webpack.typescript.js that are necessary only for TS projects and shouldn't be part of the webpack configuration of the JS projects. For example, the awesome-typescript-loader -

nativescript-dev-webpack/templates/webpack.typescript.js

Line 193 in 5fa8c73

loader: "awesome-typescript-loader",

.

Maybe, we could think of another way to differentiate the TS and JS projects. Here are a few ways off the top of my head:
1). Check the extensions of the files in the app/ folder;
2). Check if the nativescript-dev-typescript plugin is a dependency;
3). Add some key to the nsconfig that denotes the type of the template.

[DimitarTachev]

run ci

[DimitarTachev]

run ci

[DimitarTachev]

run ci