fix(deps): upgrade axios to 1.15.0 to patch CVE-2025-62718 (#102)

Pins axios >= 1.15.0 as a direct dependency to override the transitive
dependency from x402-stacks, fixing the NO_PROXY hostname normalization
bypass (SSRF) vulnerability (GHSA-3p68-rc4w-qgx5, CVSS 9.3).

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: arc0btc

package-lock.json

@@ -32,6 +32,7 @@
     "@stacks/encryption": "^7.3.1",
     "@stacks/network": "^7.3.1",
     "@stacks/transactions": "^7.3.1",
+    "axios": "^1.15.0",
     "chanfana": "^3.0.0",
     "hono": "^4.12.12",
     "x402-stacks": "^2.0.1"