Upgrade to Amp v2

src/AcmeFactory.php

@@ -4,13 +4,10 @@ namespace Kelunik\AcmeClient;
 
 use Kelunik\Acme\AcmeClient;
 use Kelunik\Acme\AcmeService;
-use Kelunik\Acme\KeyPair;
-use Webmozart\Assert\Assert;
+use Kelunik\Acme\Crypto\PrivateKey;
 
 class AcmeFactory {
-    public function build($directory, KeyPair $keyPair) {
-        Assert::string($directory);
-
+    public function build(string $directory, PrivateKey $keyPair): AcmeService {
         return new AcmeService(new AcmeClient($directory, $keyPair));
     }
 }