Fix chai to version 4.4.0 in Brink external test #14773
Merged
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Brink is a CommonJS project and currently depends on Chai version 4.x. However, the recent transition of Chai to ESM-only starting from version 5.x (see: chaijs/chai#1561 (comment)) has led to CI failures in our external tests (see: https://app.circleci.com/pipelines/github/ethereum/solidity/32302/workflows/998b76e7-be1f-4e17-843e-9d8e212a4df6/jobs/1444699).
Given that our external tests always run with the latest dependencies, it seems fine to temporarily fix the Chai version to 4.x until Brink migrates to ESM.