Please add `--output` flag that is same as `-o`

**Is your feature request related to a problem? Please describe.**
It is **extremely** annoying when someone types `--output` every time, just to learn that such flag does not exists. Turns out, the command needs to be edited from `--output` → `-o`

**Describe the solution you'd like**
Adding a `--output` flag, which would be an alias for `-o`

**Describe alternatives you've considered**
*none*

**Additional context**
I hope there isn't any specific reason for the nonexistence of this flag.