Fixes #2622. Fixes #2588.

Suggested at https://laravel-news.com/laravel-5-4-key-too-long-error

app/Foundation/Providers/AppServiceProvider.php

@@ -15,6 +15,7 @@ use AltThree\Bus\Dispatcher;
 use CachetHQ\Cachet\Bus\Middleware\UseDatabaseTransactions;
 use CachetHQ\Cachet\Services\Dates\DateFactory;
 use Illuminate\Database\Eloquent\Relations\Relation;
+use Illuminate\Support\Facades\Schema;
 use Illuminate\Support\ServiceProvider;
 use Illuminate\Support\Str;
 
@@ -34,6 +35,8 @@ class AppServiceProvider extends ServiceProvider
      */
     public function boot(Dispatcher $dispatcher)
     {
+        Schema::defaultStringLength(191)
+
         $dispatcher->mapUsing(function ($command) {
             return Dispatcher::simpleMapping($command, 'CachetHQ\Cachet\Bus', 'CachetHQ\Cachet\Bus\Handlers');
         });