refs #434 dateformat files combining.

app/Http/Kernel.php

@@ -91,10 +91,7 @@ class Kernel extends HttpKernel
         'install' => \App\Http\Middleware\CanInstall::class,
         'company.settings' => \App\Http\Middleware\LoadSettings::class,
         'company.currencies' => \App\Http\Middleware\LoadCurrencies::class,
-        'dateformat.paid_at' => \App\Http\Middleware\DateFormatPaidAt::class,
-        'dateformat.due_at' => \App\Http\Middleware\DateFormatDueAt::class,
-        'dateformat.billed_at' => \App\Http\Middleware\DateFormatBilledAt::class,
-        'dateformat.invoiced_at' => \App\Http\Middleware\DateFormatInvoicedAt::class,
+        'dateformat' => \App\Http\Middleware\DateFormat::class,
         'money.amount' => \App\Http\Middleware\MoneyAmount::class,
         'money.price' => \App\Http\Middleware\MoneyPrice::class,
         'money.total' => \App\Http\Middleware\MoneyTax::class,