Migrate to TSDOC

[antonk52]

Due to typescript not being able to leave import(filepath) as is when compiling to commonjs target even though dynamic imports work in commonjs nodejs projects since nodejs v14 I had to use eval when releasing 3.1 of this package. eval is a bad practice and can be a source of security vulnerabilities. I could not find a way to make typescript output dynamic imports as is and not turn it into Promise.resolve().then(() => require(filepath)). So I decided that it would be easier to migrate to TSDOC.

• All runtime code remain the same. Except one test that had an error in it as it was comparing non existing properties.
• Exported types moved to index.d.ts which is also checked in.
• This migration also allowed to notably simplify test, lint and build setups.