chore: @profullstack/x402-gateway 0.15.3 (browsers asking for a page are never 402'd) (#20)

Chrome 120-132 and Firefox 130 desktop user agents got the x402 JSON offer
instead of the page; 0.15.3 lets any request that asks like a browser read
it. Declared AI crawlers are still charged. profullstack/x402-gateway#28

Co-authored-by: Anthony Ettinger <anthony@profullstack.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: 3 people

package.json

@@ -57,7 +57,7 @@
     "@profullstack/redeem-credits": "0.2.0",
     "@profullstack/sealed-secrets": "0.1.0",
     "@profullstack/webhooks": "0.2.1",
-    "@profullstack/x402-gateway": "^0.15.2",
+    "@profullstack/x402-gateway": "^0.15.3",
     "@simplewebauthn/server": "^14.0.3",
     "hono": "4.13.14",
     "mailchecker": "6.0.21",