Allow p3k/http 0.2

p3k/http 0.2 keeps the same API, fixes an implicitly nullable parameter
that PHP 8.4 deprecates, and adds an opt-in safe mode for fetching
untrusted URLs.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

composer.json

@@ -13,7 +13,7 @@
   ],
   "require": {
     "indieweb/link-rel-parser": "0.1.*",
-    "p3k/http": "0.1.*",
+    "p3k/http": "0.1.* || 0.2.*",
     "p3k/utils": "1.*"
   },
   "require-dev": {