Build(deps-dev): Bump synchronous-promise from 2.0.14 to 2.0.15 (#9359)
Bumps [synchronous-promise](https://github.com/fluffynuts/synchronous-promise) from 2.0.14 to 2.0.15.
- [Release notes](https://github.com/fluffynuts/synchronous-promise/releases)
- [Commits](https://github.com/fluffynuts/synchronous-promise/compare/v2.0.14...v2.0.15)
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