build(deps): bump libcore from b8ff1d4 to e8e7efc

Bumps [libcore](https://github.com/hiddify/hiddify-next-core) from `b8ff1d4` to `e8e7efc`.
- [Release notes](https://github.com/hiddify/hiddify-next-core/releases)
- [Commits](hiddify/hiddify-core@b8ff1d4...e8e7efc)

---
updated-dependencies:
- dependency-name: libcore
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>