Recent typings change breaks .add(1, "week")

**Describe the bug**
When including quarterOfYear plugin, the type of the add function changes from : `add(value: number, unit?: ManipulateType): Dayjs` to `add(value: number, unit: QUnitType): Dayjs` which incorrectly removes `"week" | "weeks" | 'w'` from possibilities.

**Expected behavior**
No type error when calling `dayjs().add(1, "week")`when the quarterOfYear plugin is loaded.

**Information**
- Day.js Version [1.11.2]