fix: stdev calculation for less than 2 runs#100

not-matthias merged 1 commit intomainCodSpeedHQ/codspeed-rust:mainfrom

cod-1051-api-validation-error-handling-stdev-is-null-for-divanCodSpeedHQ/codspeed-rust:cod-1051-api-validation-error-handling-stdev-is-null-for-divanCopy head branch name to clipboard