feat: implement write-dts mode

[adriangodong]

This PR adds a new mode called write-dts. When selected, the plugin will emit tsbuildinfo, d.ts, and d.ts.map files. This allows the plugin to work together with ts-loader (with transpileOnly set to true) or babel-loader and emit type definition files.

Fixes #663, #658

[piotr-oles]

Code looks great, I will wait for the CI and if everything is green, we're good to merge :) Thanks for the contribution!

[adriangodong]

@piotr-oles ping for merge 🙏

[piotr-oles]

🎉 This PR is included in version 6.5.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[PierBJX]

@piotr-oles @onigoetz @adriangodong

After investigation (look at e2e test), in order to make it work, you need to set the build typescript option to true.

See the working configuration:

module.exports = {
  entry: './foo.ts',
  module: {
    rules: [
      {
        test: /\.ts$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'ts-loader',
            options: {
              transpileOnly: true,
            },
          },
        ],
      },
    ],
  },
  plugins: [
    new ForkTsChecker({
      typescript: {
        build: true,
        mode: 'write-dts',
      },
    }),
  ],
};

I don't know if it was the expected behavior but with this configuration it works. Remove build: true, you will see it does not work anymore. Indeed, by default, the value is set to false.

[piotr-oles]

🎉 This PR is included in version 7.0.0-alpha.15 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[piotr-oles]

🎉 This PR is included in version 6.5.0 🎉

The release is available on:

• npm package (@release-6.5.x dist-tag)
• GitHub release

Your semantic-release bot 📦🚀