Use new @babel/typescript preset instead of ts-loader

[tniezg]

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

• There's an issue with named exports being ignored in TS: Webpack watch missing changed files TypeStrong/ts-loader#697. Can lead to missing import errors during development in webpack --watch mode.
• Two loaders are used and on the same thread. Slower than it could be.

Describe the solution you'd like.

Use similar approach as in https://github.com/facebook/create-react-app with @babel/typescript and https://github.com/Realytics/fork-ts-checker-webpack-plugin

Describe alternatives you've considered.

• Add extra import statements inside files.
• Modify tsconfig.json and ts-loader configs to have babel-loader recognize missing .ts files.

Additional context

-

[tniezg]

Another thread about the issue with regenerating pure TS files: TypeStrong/fork-ts-checker-webpack-plugin#36. Bottom line - there's no solution as of now.

Closing issue. Will reopen when there are more reasons to upgrade.

For future reference: #64

Using a CI service will partially help with this issue. CI builds will fail when pure TS files are "incorrect".

[tniezg]

• Babel completely removed in Upgrade main and test packages #179.
• --watch mode solved by feat: add depending .d.ts files as changed when watch is triggered TypeStrong/ts-loader#698. Looking into integrating this solution into the SDK.