Bump lib/CPP_BIDS from eeb0ad7 to 8536d1c (#70)

Bumps [lib/CPP_BIDS](https://github.com/cpp-lln-lab/CPP_BIDS) from `eeb0ad7` to `8536d1c`.
- [Release notes](https://github.com/cpp-lln-lab/CPP_BIDS/releases)
- [Commits](cpp-lln-lab/CPP_BIDS@eeb0ad7...8536d1c)

---
updated-dependencies:
- dependency-name: lib/CPP_BIDS
  dependency-type: direct:production
...

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Author: dependabot[bot]