Can't create type with .default

[Mishgun]

Version "mongoose-schema-to-graphql": "^2.7.2"
My type:

const createType = require('mongoose-schema-to-graphql').default;
const Calendar = require('../../models/calendar');

module.exports = createType({
  name: 'Calendar',
  description: 'Calendar collection type',
  class: 'GraphQLObjectType',
  schema: Calendar.schema,
  exclude: ['_id']
});

Returns this error:

module.exports = createType({
                 ^
TypeError: createType is not a function

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If I use withiut .default I'm having only created name (in this case name = Calendar). So this will create new error:
GraphQLError: Syntax Error: Unexpected Name "Calendar"

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Where I can find normal example with this implementation? (example app)