Request to remove Index signatures from typescript definitions #2905

• [ x ] I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

It's not possible to implement many of the common interfaces (NodeConfig, ModelConfig etc) without implementing an Index Signature.([key: string]: unknown;) This seems unnecessary, unintuitive and prevents strong typing of the classes.

The aim is to create a MyNodeConfig class that extends the functionality of NodeConfig (for example), adding custom properties and the like.

What does the proposed API look like?

Just remove the following from the TS type definitions :-)

([key: string]: unknown;

If you agree to this I'm happy to provide a PR.

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