Changed string length

Author: lizhuangzhuang

database/migrations/2017_03_03_100000_create_options_table.php

@@ -16,7 +16,7 @@ public function up()
         Schema::create('options', function (Blueprint $table) {
             $table->increments('id');
             $table->string('module', 40);
-            $table->string('key', 190);
+            $table->string('key', 191);
             $table->text('value');
             $table->string('comment')->nullable();
             $table->timestamps();