Bump bats-assert from 8200039 to 912a988

Bumps [bats-assert](https://github.com/jasonkarns/bats-assert-1) from `8200039` to `912a988`.
- [Release notes](https://github.com/jasonkarns/bats-assert-1/releases)
- [Commits](bats-core/bats-assert@8200039...912a988)

---
updated-dependencies:
- dependency-name: bats-assert
  dependency-version: 912a98804efd34f24d5eae1bf97ee622ca770e99
  dependency-type: direct:development
...

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Author: dependabot[bot]