"error: schema is invalid: data/properties/required must be object,boolean" does not give line number

None of `--error` options help. I'm not even sure what the actual error is, but a line number would _really_ help.

See also #34 , #111 .

It's possible that `json-source-map` can be used to figure this out somehow (see [here](https://github.com/ajv-validator/ajv-cli/issues/34#issuecomment-299582712)), but I don't know the exact steps. Moreover, needing to jump through additional hoops makes this tool borderline useless to me.

Perhaps adding this functionality to the tool would be possible? For instance, see (at time of this writing, year-old) PR https://github.com/ajv-validator/ajv-cli/pull/189#issue-980783689.