Bump pydantic from 2.12.5 to 2.13.4

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.12.5 to 2.13.4.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/v2.13.4/HISTORY.md)
- [Commits](pydantic/pydantic@v2.12.5...v2.13.4)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-version: 2.13.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -12,7 +12,7 @@ requires-python = ">=3.10"
 dependencies = [
     "cryptography >= 44.0.0",
     "requests >= 2.33.1",
-    "pydantic == 2.12.5"
+    "pydantic == 2.13.4"
 ]
 description = "Accept bitcoin with BitPay"
 readme = "README.md"