jest testSequencer option not handled if it is .ts

[zyf0330]

🐛 Bug Report

set testSequencer option into jest.config.js, which is a ts file and is not transformed by ts-jest

To Reproduce

Steps to reproduce the behavior:

1. use ts-jest as preset and set testSequencer option as a ts file
2. run jest and give error Cannot use import statement outside a module

Expected behavior

no error

Link to repo (highly encouraged)

Debug log:

# content of ts-jest.log :

envinfo

System:
    OS:
    Node version:

Npm packages:
    jest: 27.0.6
    ts-jest: 27.0.5
    typescript:4.3.5
    babel(optional):

[ahnpnl]

Hi, Jest currently doesn't support testSequencer in TypeScript therefore ts-jest cannot transform it. Pls open a Jest issue to request for that feature.

[zyf0330]

jestjs/jest#8810