Fixed migrations so that api_key_roles index does not fail

data/migrations/Version20210102174433.php

@@ -25,7 +25,7 @@ final class Version20210102174433 extends AbstractMigration
         $table->setPrimaryKey(['id']);
 
         $table->addColumn('role_name', Types::STRING, [
-            'length' => 256,
+            'length' => 255,
             'notnull' => true,
         ]);
         $table->addColumn('meta', Types::JSON, [

data/migrations/Version20210118153932.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20210118153932 extends AbstractMigration
+{
+    public function up(Schema $schema): void
+    {
+        // Prev migration used to set the length to 256, which made some set-ups crash
+        // It has been updated to 255, and this migration ensures whoever managed to run the prev one, gets the value
+        // also updated to 255
+
+        $rolesTable = $schema->getTable('api_key_roles');
+        $nameColumn = $rolesTable->getColumn('role_name');
+        $nameColumn->setLength(255);
+    }
+
+    public function down(Schema $schema): void
+    {
+    }
+}