Mallory Adams 5ab6031382 Do not traverse through git repositories (#6) ...

This makes `git list` a lot faster (10 minutes to under 2 minutes in one
test) and displays more useful information.

Example of `git list` from before this change demonstrating that `git
list` was hiding the information about the main repository in favour of
showing information about a `composer` dependency:

```
├── iguana-extras
│   └── vendor
│       └── dxw
│           └── iguana HEAD ok
│                      master ok
```

Example from after this change:

```
├── iguana-extras master  [ 1 untracked ]
│                 feature/readme no upstream
│                 feature/update-iguana no upstream
│                 fix/php-cs-fixer no upstream
```

2020-07-08 14:35:22 +02:00

..

io.go

Do not traverse through git repositories (#6)

2020-07-08 14:35:22 +02:00