No validation when combining objects with oneOf or anyOf

[cswilson90]

Validation doesn't work for a schema which combines multiple objects with oneOf or anyOf.

const schema = {
  oneOf: [
   {
      properties: {
        foo: {
          type: 'string',
        },
      },
      required: ['foo'],
      type: 'object',
    },
    {
      properties: {
        bar: {
          type: 'string',
        },
      },
      required: ['bar'],
      type: 'object',
     },
  ],
};

Validating with this schema doesn't display any errors when the input doesn't match:

json-schema-library does return an error but it's being ignored by the validation code because OneOfError is not in positionalErrors and the pointer only has keyFrom/keyTo and not valueFrom/valueTo.

Changing oneOf to anyOf in the schema has the same problem.