Update typescript from 3 to 4

[johann1301s]

TSDX uses typescript version 3.

Many new features are available in version 4. Please update to the latest version.

[tim-phillips]

The latest code in this repo uses typescript v4, but the latest published version of TSDX is still referencing v3, however the build step in the published version is using rollup-plugin-typescript2@0.27.3, which is using typescript@4.0.3.

[johann1301s]

If you for example use Template Literal Types, for instance;

type World = "world";
 
type Greeting = `hello ${World}`;

Compilation fails since it is a TS 4.1 feature.

[OrkhanAlikhanov]

@tim-phillips That's not correct. At least with yarn. Rollup gets to use ts 3.9. I have a script that removes that typescript from local node_modules of tsdx. That makes it use ts 4 installed. Something like this:

"prebuild": "rm -rf node_modules/tsdx/node_modules/typescript"

[karlhorky]

There are a number of other issues in this repository about the super-old TypeScript 3.9.9 inside tsdx@0.14.1 causing problems for people, where this is documented:

• Yarn Resolutions or npm Overrides: 'React' refers to a UMD global, but the current file is a module. Consider adding an import instead.ts(2686) #1149 (comment)
• pnpm Overrides: Support Typescript 4 #926 (comment)

[TheMikeyRoss]

I think this repo is abandoned by @jaredpalmer

[Vovan-VE]

Using a fork weiran-zsd/dts-cli.