[5.8] use bigIncrements by default

All new migrations will be using bigIncrements
laravel/framework#26472

database/migrations/2014_10_12_000000_create_users_table.php

@@ -14,7 +14,7 @@ class CreateUsersTable extends Migration
     public function up()
     {
         Schema::create('users', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('name');
             $table->string('email')->unique();
             $table->timestamp('email_verified_at')->nullable();