💥 Add strong type definition for fetch().json()

[aaditmshah]

Closes #24. You can review this PR on a per-commit basis. Here are the main changes that I made.

1. I used the TypeScript/src/lib/libs.json file to get the list of lib files.
2. I split the lib files into source files and target files.
3. This change was necessary to generate the lib.dom.d.ts file.
4. I ran the build:lib and build:diff commands to regenerate the assets.
5. I removed @typescript/lib-header from the list of dependencies in the tests directory.
6. I added a strong type definition and a corresponding test for fetch().json().

[aaditmshah]

@uhyo I don't know why the check is failing. It's working for me locally.

[uhyo]

I even got a different error. Let me try upgrading Node.js version on CI first 😨

[uhyo]

@aaditmshah Running npm install in the tests directory seems to produce a diff in package-lock.json. Could you try that?

Anyway thank you for this! The first improvement in lib-dom would be absolutely nice.

[aaditmshah]

@aaditmshah Running npm install in the tests directory seems to produce a diff in package-lock.json. Could you try that?

Downgraded to node version 16 and generated a package-lock.json version 2 file. The continuous integration test is passing now.

We should probably add an .nvmrc file to the repository. What do you think?

[uhyo]

Oh actually using version 3 would be file. I guess there was just something wrong with original commit. I tested locally with latest npm and it seems to work. Also Node.js on CI has been upgraded to CI should be happy with v3 lockfiles.

[uhyo]

CI was falling again so I pushed the result of npm install for fix. Does this look fine? 😇

[aaditmshah]

CI was falling again so I pushed the result of npm install for fix. Does this look fine? 😇

Looks good to me.

[uhyo]

Awesome, thank you 😃

[uhyo]

I think I can release tomorrow 🙂