Update migration's primary identifier change

[suyar]

This is the migration file in laravel：
2019_12_14_000001_create_personal_access_tokens_table.php

....
Schema::create('personal_access_tokens', function (Blueprint $table) {
    $table->id();
...

This is the migration file in sanctum：
2019_12_14_000001_create_personal_access_tokens_table.php

...
Schema::create('personal_access_tokens', function (Blueprint $table) {
    $table->bigIncrements('id');
...

I think the id field should be kept consistent.

[driesvints]

I think we couldn't do this before with Sanctum supporting older versions but seems to be okay now.