TypeScript types are difficult to use

[sstone1]

The TypeScript types are generated as follows:

export var ModelManager: typeof import("./lib/modelmanager");

This means that you end up having to write verbose code to use the types:

import {
  ModelManager
} from '@accordproject/concerto-core';

// This is OK.
const modelManager = new ModelManager();

someFunc(
  // This is way too verbose!
  modelManager: InstanceType<typeof ModelManager>
): void {
  // TODO: implementation
}

The problem stems from the way they are exported from index.js:

module.exports.ModelManager = require('./lib/modelmanager');

Switching them to this pattern:

const ModelManager = require('./lib/modelmanager');

module.exports = {
    ModelManager
};

Results in more common TypeScript types:

import ModelManager = require("./lib/modelmanager");
export { ModelManager };

And easier usage of those types:

import {
  ModelManager
} from '@accordproject/concerto-core';

// This is OK.
const modelManager = new ModelManager();

someFunc(
  // This is better!
  modelManager: ModelManager
): void {
  // TODO: implementation
}