Not checking .ts files?

[roanvanstaveren]

For me it doesn't check .ts files.
.html files are being checked properly.
I used this CLI line:
ngx-translate-lint -p ./src/app/**/*.ts -l ./src/assets/i18n/en.json -z disable
as well as this one
ngx-translate-lint -p ./src/app/**/*.{html,ts} -l ./src/assets/i18n/en.json -z disable
There are clearly typos in the translation keys.
Am I doing something wrong?