Revert "Use ES6 import in TypeScript README example"

[grind086]

Reverts #140

This syntax causes TypeScript to output incorrect code. worker-loader creates a module like the following:

module.exports = function() {
  return /* factory */
};

To describe this module in TypeScript you would use

declare module moduleName {
  export = /* typeof factory */
}

and to import it you use

import moduleName = require('path/to/module');

This is how I originally wrote the docs. The change assumes that worker-loader uses a module of the form

exports.default = function() {
  return /* factory */
};

and emitted code will attempt to reference the default property of the module, resulting in a TypeError whenever you try to use the module (since the property is undefined).

TypeScript doc reference: https://www.typescriptlang.org/docs/handbook/modules.html#export--and-import--require

[codecov]

Codecov Report

Merging #151 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #151   +/-   ##
=======================================
  Coverage   66.21%   66.21%           
=======================================
  Files           5        5           
  Lines          74       74           
  Branches       25       25           
=======================================
  Hits           49       49           
  Misses         22       22           
  Partials        3        3

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[codecov]

Codecov Report

Merging #151 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #151   +/-   ##
=======================================
  Coverage   66.21%   66.21%           
=======================================
  Files           5        5           
  Lines          74       74           
  Branches       25       25           
=======================================
  Hits           49       49           
  Misses         22       22           
  Partials        3        3           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 612511d...514cb8a. Read the comment docs.

[alexander-akait]

Sorry for delay, closing in favor #253, we will update docs in the near future