chore(deps): update dependency testableio.system.io.abstractions to v19.2.87#424

mergify[bot] merged 1 commit intomainTestably/Testably.Abstractions:mainfrom

renovate/testableio.system.io.abstractions-19.xTestably/Testably.Abstractions:renovate/testableio.system.io.abstractions-19.xCopy head branch name to clipboard