Improve logger types

[shawnmcknight]

📝 Description

The current types for the LoggerFactory and Base Logger are incorrect in some cases or not specific enough in others. Multiple methods are accepting GenericObject instead of the more accurate LoggerBindings type and have been updated accordingly. Additionally, rather than allowing string as a type for the log levels return value, the more specific LogLevels type was used. Finally, the return types for getLogHandler was updated to reflect the correct return type of the function.

💎 Type of change

• Bug fix (non-breaking change which fixes an issue)

🚦 How Has This Been Tested?

I've patched my local moleculer installation with these changes and implemented a custom logger using those fixed types.

🏁 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

[icebob]

Cool, thanks!