Added missing imports

database/migrations/2015_05_24_210939_create_jobs_table.php

@@ -11,6 +11,7 @@
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
 
 class CreateJobsTable extends Migration
 {

database/migrations/2015_05_24_210948_create_failed_jobs_table.php

@@ -11,6 +11,7 @@
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
 
 class CreateFailedJobsTable extends Migration
 {

database/migrations/2015_10_31_211944_CreateInvitesTable.php

@@ -11,6 +11,7 @@
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
 
 class CreateInvitesTable extends Migration
 {

database/migrations/2016_04_29_061916_AlterTableSubscribersAddGlobalColumn.php

@@ -11,6 +11,7 @@
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
 
 class AlterTableSubscribersAddGlobalColumn extends Migration
 {