Fix BaseValidator constructor typing

[richardgarnier]

📝 Description

When looking at BaseValidator, the constructor accepts the name of the param to use for validation.
This was not reflected in the .d.ts

🎯 Relevant issues

I did not open any issue for this.

💎 Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

🚦 How Has This Been Tested?

In the current version, this has a TS error.
With the fix, the TS error is gone

class MyValidator extends Validators.Base {
  constructor() {
    super({ paramName: 'schema' });
  }
  
  [...]
}

🏁 Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have commented my code, particularly in hard-to-understand areas

[richardgarnier]

I'd like to add that the return of compile being simply Function is also not very helpful.
I'll make another PR to fix it, if it is welcome.