fix(tsconfig): path mapping (module alias)

[jjangga0214]

Hi!

I think tsconfig's path mapping does not work.

Reproduction

1. Clone https://github.com/jjangga0214/ts-yarn-lerna-boilerplate.
2. After the clone, do not get into the project, but create a new project, called node-dependency-tree-test.
3. In node-dependency-tree-test, write the code below.

dependencyTree.toList({
    directory: '/path/to/ts-yarn-lerna-boilerplate',
    filename: '/path/to/ts-yarn-lerna-boilerplate/packages/bar/src/index.ts',
    tsConfig: '/path/to/ts-yarn-lerna-boilerplate/tsconfig.json',
  })

4. Execute it.
5. It shows

[
  '/path/to/ts-yarn-lerna-boilerplate/packages/bar/src/index.ts'
]

,which actually should be

[
  '/path/to/ts-yarn-lerna-boilerplate/packages/foo/src/hello.ts',
  '/path/to/ts-yarn-lerna-boilerplate/packages/foo/src/index.ts'
  '/path/to/ts-yarn-lerna-boilerplate/packages/bar/src/index.ts'
]

Thanks!

P.S. You might see how tsconfig-paths and tsc-alias work.