Feature Request: Option to sort file tree alphabetically

[evanheckert]

So for example my migrations folder currently outputs like this:

├── people
│   ├── migrations
│   │   ├── 0007_customuser_can_reconcile.py
│   │   ├── 0008_customuser_hourly_rate.py
│   │   ├── 0004_customuser_installer_code.py
│   │   ├── __init__.py
│   │   ├── 0002_customuser_is_crew_customuser_is_hourly.py
│   │   ├── 0003_rename_is_crew_customuser_is_installer_and_more.py
│   │   ├── 0001_initial.py
│   │   ├── 0005_customuser_is_driver.py
│   │   └── 0006_weeklytimecard.py

while I'd prefer it output this:

├── people
│   ├── migrations
│   │   ├── __init__.py
│   │   ├── 0001_initial.py
│   │   ├── 0002_customuser_is_crew_customuser_is_hourly.py
│   │   ├── 0003_rename_is_crew_customuser_is_installer_and_more.py
│   │   ├── 0004_customuser_installer_code.py
│   │   ├── 0005_customuser_is_driver.py
│   │   └── 0006_weeklytimecard.py
│   │   ├── 0007_customuser_can_reconcile.py
│   │   ├── 0008_customuser_hourly_rate.py

Then of course would prefer the output of each file to be in the same order. Would help especially with things like these migrations in which that order matters quite a bit.

Many thanks for this repo!