Browserstack connection dosn't work with Playwright version 1.39.0 #9

With version 1.39.0, browserstack throws the error "Error: browserType.connect: Error: deviceDescriptors: expected array, got undefined", likely because 1.39.0 is not available yet with Browserstack.
Same, when using 1.37.1 version, browserstack is automatically picking 1.38.0 (even when mentioned explicitly "client.playwrightVersion": "1.37.1"), and throwing errors.

Ideally, "client.playwrightVersion": should be able to work with the exact specified playwright version so to avoid such breaking changes.