npm run webpackのエラー

Question

npm run webpackを実行したところ、

> vaio@1.0.0 webpack C:\Users\VAIO
> webpack

Hash: b0a3c2adc9cc49bc329e
Version: webpack 4.43.0
Time: 3764ms
Built at: 2020-06-11 5:28:58
 3 assets
Entrypoint index = test_npm.js
[0] ./index.ts 131 bytes {0} [built] [1 error]

ERROR in C:\Users\VAIO\index.ts
./index.ts
[tsl] ERROR in C:\Users\VAIO\index.ts(11,17)
      TS2691: An import path cannot end with a '.ts' extension. Consider importing '.deps' instead.
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! vaio@1.0.0 webpack: `webpack`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the vaio@1.0.0 webpack script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\VAIO\AppData\Roaming\npm-cache\_logs\2020-06-10T20_28_58_969Z-debug.log

上記のエラーが出ました。

index.ts

function sum(v1: number, v2: number): number {
return v1+v2;
}

const n = 1;
const s = 2;

const result = sum(n, s);
console.log(result);

import sum from '.\deps.ts';
sum(1,2);

どのような編集を行えばいいのでしょうか。
deps.tsをdeps.depsと書き換えてみましたが、そんな拡張子は無いとエラーがでてしまいました 。