setErrorHandler method is missing from Parser class in TypeScript target

[SuraiyaBegumK]

I extended DefaultErrorStratergy class to customize the ANTLR error messages

The Java implementation (and the documentation for the BailErrorStrategy) suggest that such a method should exist.

After staring at the source, the only way I've found to change the error strategy is to modify the _errHandler field of the parser directly which is also not working as expected to customize the error messages