feat(testrunner): "sourcemapify" crash error stacktraces (#441)
feat(testrunner): "sourcemapify" crash error stacktraces (#441)

Whenever test runner crashes due to UnhandledPromiseRejection, the
related error should be run through "sourcemap decoding".
microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright