Add some routing, start working on actually searching webmentions

tests/Gateways/SqliteGatewayTest.php

@@ -120,6 +120,10 @@ class SqliteGatewayTest extends TestCase
             "Some Author Name"
         ));
 
+        $this->gateway->find([
+            "id; DROP TABLE webmentions;" => 'whatever'
+        ]);
+
         $this->assertCount(
             2,
             $this->gateway->find([