Database Migration Error

I see this error:
```
"SQLSTATE[42000]: Syntax error or access violation: 1170 BLOB/TEXT column 'name' used in key specification without a key length"

```
When I try to run the artisan command: `php artisan migrate --database=tracker` following the setup tutorial.
[tracker_error.txt](https://github.com/antonioribeiro/tracker/files/1041736/tracker_error.txt)

Start with the setup tutorial and reproduce `php artisan migrate --database=tracker` using the details in tracker_error.txt. Trace which migration produces the reported BLOB/TEXT key-length error and determine the project-compatible change needed; done means the tutorial migration completes successfully on the tracker database.

Written by the indexing model from the issue text.