message: replace jsonOutputFile with outputFile
diff: @@ -87,7 +87,7 @@ Show some helpful information, similar to this page.
  Prints the test results in JSON. This mode will send all other test output and user messages to stderr.
  -### `--jsonOutputFile=<filename>`
  +### `--outputFile=<filename>`
  Write test results to a file when the `--json` option is also specified.
  