refactor: resolve small eslint rules and TS settings

[wellwelwel]

About 1,209 additions and 1,791 deletions:

• Around -904 is because package-lock.json by removing unused dependencies
• Around +1,184 and −735 it's just the indentation: 2 from ESLint and printWith: 80 from Prettier

In practice, around 35 additions and 126 deletions were "really" made.

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In this refacoring task:

No types were changed in this PR except for ban-types
See ab0de35

• Resolve the following eslint rules:
  • indent
  • no-mixed-spaces-and-tabs
  • @typescript-eslint/no-unused-vars
  • @typescript-eslint/ban-types *

Unfortunately, the ban-types resolution for Connection and PoolConnection will need to be resolved together with joining the spread types.

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• Remove unused TS tests
• Remove unused dependencies
  • @types/mocha, @types/chai, mocha and chai dependencies

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• Redefine the tsconfig.json
  • Include index.d.ts, promise.d.ts and the typings folder
  • Remove "strictFunctionTypes": false

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An easy way to review it, is looking for commits:

• 8f7445e (redefine TypeScript settings)
• ae2f98f (remove unused type tests)
• ab0de35 (resolve eslint ban-types)
• 744a49e (rollback eslint ban-types for Connection and PoolConnection)
• etc.

And finally:

• 57770aa (resolve small eslint rules)
  • indentation and printWidth 👻

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See more in #2072

[wellwelwel]

@sidorares, is it okay if I merge the refactoring up to the point where no types are actually changed?

Then I would stop at the main change, which would be the joining the spread types and wait for an accurate review.

My intention is not to take up too much of your time, it's okay if you can't see it now or just say to wait 🙋🏻‍♂️

I want to gradually fix all the #2072 missing and wrong types (if someone proposes first, that would be great).
These refactoring would help make these fixes easier.

[sidorares]

go for it @wellwelwel

[wellwelwel]

@sidorares, it's done. So far, no type has changed 🤹🏻‍♀️

Now, I will create a separate PR for the last two refactoring tasks:

• Join spread out types
• Create a reusable way for query and execute overloads