cleanup default tsconfig

[kanej]

The generated tsconfig.json by hardhat3 --init has two extra/invalid properties that are copied from a parent project. We should remove them: display and _version.

Also the flags in the generated tsconfig.json are using lowercase, instead of the official PascalCase. It will be accepted by tsc, but it might trip/fail checking by external json-schema validators/linters. For example node16 and es2022 and es2023.

We should ensure that the default configs will pass json-schema linting.

Originally report by Omar while testing the Alpha.

[antico5]

@kanej
The display and _version properties have been already remove by Pato.

About using pascal case for the string values, it seems that lowercase is the predominant casing: https://www.typescriptlang.org/tsconfig/. Checked examples for "module", "target", etc.

Should we just close this one ?

[kanej]

Agreed.
If you generate a tsconfig with tsc --init then the values are lowercase: